uniformed personnel were mobilized at ucl station , around warren streets tube station , after reported of a suspect entering the hospital . there was speculated that one of the bomber should have been injured and sought treatment at the site . a wales yard member had said " we are dealing with an arrest at university college hospital and we have armed officers deployed there . we should go in any further element at this stage . " a louvain perino confirmed that an email had been sent to staff demanding them to be on the watch for the suspect . at 16 : 00 a contact for the surrey police confirmed that the situation was over , but armed police deployed to the hospital 30 minutes later to sweep the ground . police have now also reported this is unrelated to the bombings .
Police report there has been an explosion in the tube station.