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UPDATE (10:12 a.m. PT) — An officer with the Portland Police Bureau shot and killed a man Sunday afternoon.

The shooting took place in southeast Portland after 2 p.m. on the 9600 block of SE Market Street just east of Interstate 205, police said. An officer was responding to a report of a man who was not leaving a residence.

Lidiya Omelchenko told OPB she called police after her neighbor told her there was a man who appeared to be sleeping directly outside his home.

"[My neighbor] came and talked to me, somebody sleeping on his porch, steps," Omelchenko said in an interview. "I told him, 'call the police.' After this, I went to see this man and I called [the police] too."

Omelchenko said the man appeared to be an African-American in his 40s or 50s. She said he appeared to be homeless.

The Oregonian/OregonLive first reported Omelchenko's account.

The officer arrived at the residence and contacted a man, according to the Portland Police Bureau. Shortly after, the officer radioed he had fired his gun and requested emergency medical personnel to the scene, police said.

An eyewitness told KOIN the man entered his apartment where he pulled out a knife.

"[The] police officer said 'You need to stop or I'm going to tase you.' The police officer warned him 5 or 6 times...he never listened and three gun shots went off," Desmond Pescaia told KOIN.

The man who was shot was transported to a Portland hospital where he was pronounced dead.

Neither the identity of the officer nor the deceased man has been released.

PPB Chief Danielle Outlaw said the bureau is committed to a full investigation.

"A loss of life impacts us all and I know we all immediately search for answers,” she said in a statement. "I ask for patience as we continue our investigative process and then release information as soon as it is appropriate."

A Police Bureau spokesman says the officer who fired is on paid administrative leave, pending an investigation by police and the Multnomah County District Attorney’s office.

Under bureau policy, the officer's identity will be released within 24 hours.

The Oregon State Medical Examiner is conducting an autopsy.