Police said they had detained a man after the Javelin — a fast train linking the Olympic Park in east London to St Pancras, where the cross-Channel Eurostar trains arrive — was halted for nearly two hours.
British Transport Police said officers were called to a bridge on the line at Dagenham in east London “following a report of a man threatening to jump onto the railway track.”
"A police negotiator attended the scene and the man was detained at around 1330 GMT,” a spokesman said.
There was also disruption to Eurostar trains, police said. Earlier there were long delays on one of the London Underground line — the Central Line — after a driver reported smelling smoke, said a spokesman for Transport for London.
Firefighters investigated and found no problems, but all trains to the Olympic Park station of Stratford were halted for several hours. —