At least three people have been killed and two others injured when a passenger train slammed into another on the outskirts of the Iranian capital, Tehran.

The accident happened when the passenger train en route from Iran's northeastern city of Mashhad to Tehran hit a maintenance train on the line near the town of Varamin.

According to the Iranian Labor News Agency (ILNA), three people have been killed in the accident.

No official count of the dead has yet been announced by the authorities.

CS/MD