Two men have been arrested as Tulsa police investigate three separate homicides that occurred within an eight-hour period Monday.

A woman was strangled in her south Tulsa apartment during what police called “an interrupted burglary,” and two men were fatally shot in north Tulsa.

“It’s taxing; we’ve had this happen before,” said Sgt. Dave Walker, head of the Homicide Unit. “It does run us a little thin.”

Police arrested a man who is accused of strangling Kelsey S. Tennant, 19, at 9512 E. 65th St. at about 3 p.m.

Gregory Epperson, 41, was jailed on a complaint of first-degree murder, according to a police news release.

Epperson is accused of burglarizing Tennant’s apartment and being inside when she returned home, Walker said in the release. She then was beaten and strangled, he said.

Tennant didn’t have a pulse when first responders arrived, but she was revived and taken to a hospital, Walker said. She died there about 11:50 p.m.

Epperson also is accused of assaulting Tennant’s boyfriend when he entered the apartment after her, Walker said.

Epperson, who was arrested in an adjoining apartment shortly after the assaults, had no apparent relationship with the victims, Walker said.

He is in the Tulsa Jail on complaints of first-degree murder, burglary and assault and battery.

In a separate homicide, Jeremy Armstrong, 19, died after being shot in the parking lot of a convenience store in the 2400 block of North Yale Avenue, also at about 3 p.m.

He walked while wounded to a nearby house on Vandalia Avenue, Walker said. Emergency responders transported him to a hospital, where he died.

“We believe (this case) was an attempted robbery of some marijuana,” Walker said, noting that three people fled from the shooting scene in an older maroon sedan.

Police arrested Dominique Brown, 18, on a first-degree murder complaint on Tuesday in connection with Armstrong’s death, Walker said. He also is accused of robbery with a firearm.

Officers located Brown in the 1200 block of North Santa Fe Avenue. He had a handgun with him when he was arrested, Walker said.

Investigators determined that Brown and others were involved in a drug transaction with Armstrong when a robbery attempt occurred, Walker said. Police believe Armstrong fled and was shot as he was running away from the car.

Walker said another person could also be arrested in Armstrong’s death. Police have not released his name in hopes that he will turn himself in to be interviewed, he said.

In the third homicide, Durrell Collins, 31, died after he was shot several times, apparently while driving.

Collins went to a business in the 1700 block of North Peoria Avenue about 10:30 p.m. and told employees he had been shot, Walker said.

A manager called the police, but Collins reportedly ran away before officers arrived. Police later found him in the 1800 block of East Seminole Street, Walker said.

Police determined that multiple gunshots had been fired into Collins’ vehicle. He died at a hospital about 12:05 a.m. Tuesday.

Police have not yet been able to determine a motive or identify suspects, Walker said.

The three deaths were Tulsa’s 15th, 16th and 17th homicides of the year. For comparison, 13 homicides were reported by March 21, 2016, and 17 by that point in 2015.

Anyone with information about any of the homicides may contact Crime Stoppers by phone at 918-596-COPS (2677), online at p3tips.com/918 or through the Tulsa Tips app, which can be downloaded from the Google Play or iTunes stores.

The homicide tip line may also be reached at 918-798-8477 or emails sent to homicide@cityoftulsa.org.

Paris Burris contributed to this story.