Cambridgeshire Police armed officers at Ellison Close siege
Armed police have been sent to a house after a man made threats to harm himself or anybody who tried to enter.
The siege started at 11:00 GMT at Ellison Close in Cambridge when police tried to arrest a man on suspicion of burglary.
Cambridgeshire Police say there were initially two other people in the house - a man and a woman - but they have since been let out.
The man inside is not thought to have a firearm, a force spokeswoman said.