Staff at a petrol station in Bristol have been forced to hide in a safe room after it was stormed by a man armed with a knife.
One person has been taken to hospital after leaving the petrol station in Hengrove Way, Avon and Somerset Police said.
Armed police and a negotiator have been called to the scene.
The force said: “Police are at the scene of an incident which has led to the closure of Hengrove Way, Bristol, today, Thursday 9 September.
“A man armed with a knife is inside the shop of the petrol station.
“Staff members are uninjured within a safe room and in contact with officers.
“One person has left the scene and gone to hospital with injuries not believed life-threatening.
“Armed officers and a negotiator have been deployed to try to bring the incident to a safe conclusion.
“Members of the public are urged to avoid the area.”
Officers were called at 7.36am on Thursday and were at the scene by 7.41am, police added.