A 24-hour strike in Greece halted ferries, public transport, and municipal services in Athens and other parts of the country Tuesday as unions mounted protests against pension reforms by the center-right government.

Flights, as well as national rail and bus services, were not affected.

The strike went ahead after a pension reform bill was submitted to parliament. It includes plans to lower monthly income contributions and overhaul the way some pension funds operate.

People pass outside a closed urban railway station during a strike in Athens, Tuesday, Feb. 18, 2020. Civil servant union ADEDY and communist-backed labor union PAME hold a 24-hour strike against tabling of government's pension reform law in parliament. (AP PhotoYorgos Karahalis)

People pass outside a closed urban railway station during a strike in Athens, Tuesday, Feb. 18, 2020. Civil servant union ADEDY and communist-backed labor union PAME hold a 24-hour strike against tabling of government's pension reform law in parliament. (AP PhotoYorgos Karahalis)

Pension reform is a contentious issue in Greece following a decade of crisis and international bailouts that caused successive salary and benefit cuts pushing many into financial hardship.

A metro station is closed during a strike in Athens, Tuesday, Feb. 18, 2020. Civil servant union ADEDY and communist-backed labor union PAME hold a 24-hour strike against tabling of government's pension reform law in parliament. (AP PhotoYorgos Karahalis)

A metro station is closed during a strike in Athens, Tuesday, Feb. 18, 2020. Civil servant union ADEDY and communist-backed labor union PAME hold a 24-hour strike against tabling of government's pension reform law in parliament. (AP PhotoYorgos Karahalis)

Tram are parked at a depot during a strike in Athens, Tuesday, Feb. 18, 2020. Civil servant union ADEDY and communist-backed labor union PAME hold a 24-hour strike against tabling of government's pension reform law in parliament. (AP PhotoYorgos Karahalis)

Tram are parked at a depot during a strike in Athens, Tuesday, Feb. 18, 2020. Civil servant union ADEDY and communist-backed labor union PAME hold a 24-hour strike against tabling of government's pension reform law in parliament. (AP PhotoYorgos Karahalis)

A metro station is closed during a strike in Athens, Tuesday, Feb. 18, 2020. Civil servant union ADEDY and communist-backed labor union PAME hold a 24-hour strike against tabling of government's pension reform law in parliament. (AP PhotoYorgos Karahalis)

A metro station is closed during a strike in Athens, Tuesday, Feb. 18, 2020. Civil servant union ADEDY and communist-backed labor union PAME hold a 24-hour strike against tabling of government's pension reform law in parliament. (AP PhotoYorgos Karahalis)