"We apologise for the delays and disruption to passengers travelling on the Victoria line today. Our engineers continue to work hard to repair the damaged equipment and get the line up and running as soon as possible.
"The line remains suspended between Warren Street and Brixton and this section will not run for the rest of the night. There is a risk that services on the Victoria line will start later than normal tomorrow morning.
"We therefore urge passengers to check before they travel."
More top news
Londoners who have received new electronic gadgets for Christmas are being advised to take simple steps to protect them from thieves.
The Boxing Day sales got off to a flying start with shops reporting a surge in business during the first hour of trading.
Bus strikes are planned for Monday 29 December and Monday 5 January.