Police are holding a man after an arrest by armed officers in the city last night.
A large residential area of Exeter was sealed off for more than an hour during the incident on Saturday evening.
The drama started to unfold just before 8pm when officers sealed off Monk's Road, part of Polsloe Road, and the the surrounding area.
An armed officer was posted in the street to ensure no-one crossed the police line.
Around an hour later police say they successfully arrested a man at a property in Monk's Road.
He was detained overnight and is expected to be interviewed this morning.
A police spokesman said officers from Devon and Cornwall were assisting police from another force area.
The spokesman said a particular individual was targeted.
He said: "He was not a resident of Devon and Cornwall and the information we had was that he would only be staying two or three days in the area.
"He was successfully taken into custody.
"Officers remained on the scene afterwards to reassure residents that only one person was involved and he was in custody."
The arrested man was taken to Heavitree Road police station but police could not confirm if he had been taken away by the officers of the visiting force.
At least a dozen armed officers took part in the arrest.
Monk's Road remained sealed off while officers completed their enquires following the arrest.
Police have yet to release further details about the nature of the arrest.