Transport for London (TfL) told ITV News that the issue was in the Network Rail part of London Bridge station and that underground services were running as normal.
More top news
Children are eating the equivalent of seven and a half chocolate fingers for breakfast, campaigners have warned.
Stephen Fry has suggested that the "the patter of tiny feet" may be on the agenda following his wedding to Elliot Spencer.
More than a million adults in the UK may have been wrongly diagnosed with asthma, according to an NHS watchdog.