Tunisia's electoral authority says that jailed media magnate Nabil Karoui and independent law professor Kais Saied are advancing to the country's presidential election runoff.

The electoral commission announced Tuesday that the two outsider candidates came out on top in the first round of voting Sunday. Saied had 18.4% of the vote and Karoui 15.6%.

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FILE - In this April 19 2012 file photo, Nabil Karoui, center, head of Tunisian TV Nessma channel, arrives at the courthouse in Tunis. With more than half the votes in Tunisia's presidential race counted, jailed media magnate Nabil Karoui arrived second while Kais Saied, a former conservative constitutional law professor, was in the lead. (AP PhotoAmine Landoulsi, File)

Tunisia's electoral authority says that jailed media magnate Nabil Karoui and independent law professor Kais Saied are advancing to the country's presidential election runoff.

Tunisian former conservative constitutional law professor Kais Saied kisses the national flag in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Neither candidate has ever held political office. They beat out two prime ministers and the candidate from moderate Islamist party Ennahdha, the biggest force in Tunisia's parliament.

Tunisian former conservative constitutional law professor Kais Saied arrives at his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied arrives at his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied arrives at his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied arrives at his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied stands in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied stands in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied kisses the national flag in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied kisses the national flag in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

The date for the runoff hasn't yet been announced.

FILE - In this April 19 2012 file photo, Nabil Karoui, center, head of Tunisian TV Nessma channel, arrives at the courthouse in Tunis. With more than half the votes in Tunisia's presidential race counted, jailed media magnate Nabil Karoui arrived second while Kais Saied, a former conservative constitutional law professor, was in the lead. (AP PhotoAmine Landoulsi, File)

FILE - In this April 19 2012 file photo, Nabil Karoui, center, head of Tunisian TV Nessma channel, arrives at the courthouse in Tunis. With more than half the votes in Tunisia's presidential race counted, jailed media magnate Nabil Karoui arrived second while Kais Saied, a former conservative constitutional law professor, was in the lead. (AP PhotoAmine Landoulsi, File)

Neither candidate has ever held political office. They beat out two prime ministers and the candidate from moderate Islamist party Ennahdha, the biggest force in Tunisia's parliament.

Karoui's lawyers are seeking his release from jail before the runoff. Accused of tax evasion and money laundering, he says he's the victim of a smear campaign.

Tunisian former conservative constitutional law professor Kais Saied kisses the national flag in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied kisses the national flag in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied arrives at his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied arrives at his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied arrives at his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied arrives at his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied stands in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied stands in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied poses in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied kisses the national flag in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)

Tunisian former conservative constitutional law professor Kais Saied kisses the national flag in his office in Tunis, Tunisia, Tuesday, Sept. 17, 2019. With more than half the votes in Tunisia's presidential race counted, Kais Saied was in the lead. Media magnate Nabil Karoui, a more modernizing candidate, was in second place with 15.5%. (AP PhotoMosa'ab Elshamy)