Egypt arrests 6 over Cairo train crash that killed 25

Policemen stand guard in front of a damaged train inside Ramsis train station in Cairo, Egypt, Wednesday, Feb. 27, 2019. An Egyptian medical official said at least 20 people have been killed and dozens injured after a railcar rammed into a barrier inside the station causing an explosion of the fuel tank and triggering a huge blaze that engulfed that part of the station. The head of the Cairo Railroad Hospital said the death toll is expected to rise further. (AP Photo/Nariman El-Mofty)

Firefighters hose down a train that was damaged after a crash inside Ramsis train station in Cairo, Egypt, Wednesday, Feb. 27, 2019. An Egyptian medical official said at least 20 people have been killed and dozens injured after a railcar rammed into a barrier inside the station causing an explosion of the fuel tank and triggering a huge blaze that engulfed that part of the station. The head of the Cairo Railroad Hospital said the death toll is expected to rise further. (AP Photo/Nariman El-Mofty)

Egyptian authorities have arrested six people over a deadly crash this week at Cairo's main train station that killed at least 25 people.

The country's top prosecutor ordered late Thursday that those arrested — two train conductors, their aides and two other rail workers — remain in custody for four more days pending further investigation.

Wednesday's crash also left at least 47 injured.

Prosecutor General Nabil Sadek earlier said the investigation determined the accident was triggered by a brawl between two conductors.

He says one conductor failed to put the brakes on before leaving the locomotive, unleashed the speeding, unmanned engine which then crashed into a concrete barrier at the Ramses station in downtown Cairo, setting of a huge explosion and fire.

Transportation Minister Hisham Arafat resigned after the accident.