At least five people were killed Sunday in a collision between a helicopter and a small plane on the island of Mallorca, authorities said.

The regional government of Spain's Balearic islands, which include Mallorca, tweeted that the crash happened at 1:35 p.m. (1135 GMT).

It said one of the dead was a minor.

This photo provided by Incendios f.Baleares shows wreckage by a fence near Inca in Palma de Mallorca, Spain, Sunday Aug. 25, 2019. Authorities in Mallorca say at least 5 people have died in a collision between a helicopter and a light plane on the Spanish island. (Incendios f.Baleares Via AP)

This photo provided by Incendios f.Baleares shows wreckage by a fence near Inca in Palma de Mallorca, Spain, Sunday Aug. 25, 2019. Authorities in Mallorca say at least 5 people have died in a collision between a helicopter and a light plane on the Spanish island. (Incendios f.Baleares Via AP)

Part of the wreckage from the aircraft landed near houses in a rural area.

Authorities have opened an investigation into what happened.

Spain's caretaker prime minister, Pedro Sanchez, sent his condolences on Twitter to the victims' families and expressed sadness at the "tragic accident."

No further details were immediately available.