Thousands of commuters faced travel chaos on Thursday after a debris fell from a bridge, causing one of London's busiest train stations to close.

Train services were suspended in and out of Liverpool Street station after concrete debris from the 1,300 tonne bridge fell onto the tracks, transport officials said.

Passengers on trains were evacuated late on Wednesday after a train driver reported hitting debris near the bridge, Network Rail said in a statement.

The bridge was part of the East London Line extension into Shoreditch, a spokesman for Transport for London said.

"Due to this incident national rail services into and from Liverpool Street Station remain suspended," he said in a statement.

"Engineers are on site and have been working through the night," the spokesman said. "We continue to work to restore services soon as possible."

No one was hurt in the incident.

Services were due to resume later on Thursday, officials said. The Rail Accident Investigation Branch is investigating.