Two trains collided outside the Indonesian capital Jakarta late on Monday, killing at least five people, injuring dozens, and prompting a mammoth rescue effort.

First responders were still actively working at the scene in the early hours of Tuesday, with one official telling Agence France-Presse that four people remain trapped in the wreckage.

One survivor told Agence France-Presse of the horrific moments after a long-distance train slammed into the stationary commuter train she was in, trapping...