A man is in a critical condition after being shot in the street by police.
Officers were called to reports of a man “believed to be in possession of a firearm” in Hessle Road in Hull in the early hours of Sunday.
The man was shot by officers and taken from the scene for treatment at an unnamed hospital.
A senior officer said he did not believe the incident had any terrorism connections.
Humberside Police said no-one else sustained injuries and a cordon remains in place.
Assistant Chief Constable Paul Anderson said: “We are still in the very early stages of the investigation, however we do not believe this incident to have any terrorism connection or links.”
In a statement the Independent Office for Police Conduct said: “We were notified by Humberside Police about a police shooting in Hull in the early hours of this morning.
“We understand a man was shot by police and is in hospital being treated for serious injuries.
“We have attended the scene at Hessle Road and the police post-incident procedure.
“We are carrying out an assessment to determine whether the IOPC needs to be involved in any investigation.”