British police said on Tuesday they were dealing with a security incident at London's St Thomas' Hospital, with the nearby Westminster Bridge leading to parliament closed to traffic.
Police said they would provide more information when known.
Witnesses reported on social media that there were armed police present and that the hospital was not allowing people to enter or leave.
There was no immediate comment from the hospital.


Iranian attacks damage Kuwait's power, water desalination plant for second time
Jordan denies any evacuation order was issued to Aqaba, three missiles intercepted
US ends eighth consecutive night of strikes on Iran
Indian court declines to order activist Wangchuk’s discharge from state-run hospital
Congo says number of confirmed Ebola cases rises to 2,267, including 893 deaths
