A "major incident" has been reported at London Bridge with reports suggesting that a man was wielding an axe in the train station.
IBTimes UK reporter Ewan Palmer, who was at the scene, said armed police and ambulance teams were at the scene, and that no one was being let in or out of the station.
He said an officer described it as a "major incident" but could not specify what had happened.
But Twitter feeds give more details:
"London Bridge station evacuated amid reports of man with axe, meanwhile M6 shut junc 2-4 bcs of suspicious vehicle. Jittery times."
"A guy with an axe was on my train"
London is jumpy due to a violent attack that took place earlier this week.