The train driver who caused an accident in London that injured at least two people, was arrested on Tuesday after testing positive for cocaine, daily newspaper the Sun reported.
The man, whose identity has yet to be revealed, is said to be an "experienced driver". However, a blood sample taken after the incident showed traces of cocaine, the report said.
"This has caused shock among his colleagues because it's a very serious incident," a source told the newspaper. "Luckily, by the time the train hit the buffers, it had slowed down and somehow managed to stay upright."
After the arrest, the driver was reportedly placed on bail and suspended from work. In accordance with the Transport and Works Act 1992, he could face up to six months' imprisonment and a massive fine.