The engineers of two trains that crashed head-on in Bangladesh's deadliest rail accident said Tuesday that they both had received clearance to continue their journey on the same track.

Railway officials said at least 114 people died when a 10-car express train and a mail train slammed into each other Sunday outside the farming village of Maizdi Khan, about 16 miles north of Dhaka, the capital.As many as 1,000 people were injured.

The government was investigating whether operators using a sophisticated signaling system installed five days before the crash gave the wrong signal or no signal.

The engineer of the mail train, Mo-hammad Abdur Rashid, said the signal at a nearby railway station was not working, but he received written clearance from the stationmaster to proceed.