Two Philadelphia men were killed overnight in separate incidents in the city, police said.

Shortly before 9 p.m., police were called to a rowhouse in the Holmesburg section for a report of a person with a gun. They found resident Christopher Donaghy, 27, lying on the floor with a gunshot wound to his back. Donaghy was taken to Frankford-Torresdale Hospital where he was pronounced dead at 10:09. Investigators have a suspect in custody, police said.

At 4:25 a.m., police responded to a report of a shooting in Nicetown-Tioga and found a 24-year-old man dead at the scene with a gun shot wound to his head. Further information was not immediately available.

Also this morning, police identified a city man slain on Saturday in Holmesburg. Devin Coleman, 28, was found lying on a living room floor on the 8000 block of Ditman Street with a stab wound to his chest.

Coleman, of the 13000 block of Townsend Road, was declared dead at the scene. Police arrested Sophia Crawley, 23, who resides at the house where Coleman was killed.

Contact staff writer Sam Wood at 215-854-2706 at samwood@phillynews.com.