San Diego

Police and the California Highway Patrol are investigating three accidents that killed three people in San Diego over the past two days.

Police believe Timothy Byrd, 28, was killed by a hit-and-run driver about 4:10 a.m. Friday while he walked across the 5100 block of Imperial Avenue near his Southeast San Diego home, police spokesman Bill Robinson said.

Police are seeking witnesses as well as the vehicle, which police believe headed west on Imperial Avenue, Robinson said. Byrd was pronounced dead at the scene, said Ken Bell of the coroner’s office.

Michael Owen Davies, 25, of Poway was killed Thursday when his 1990 Mazda convertible overturned four or five times on northbound Interstate 5 north of Balboa Avenue, the CHP reported.

The accident occurred at 11:20 p.m. when Davies lost control of his car, possibly while speeding, CHP spokesman Jim Anderson said. Davies was pronounced dead at the scene.

Kathleen Doyle, 32, of East San Diego died Thursday night of injuries she suffered when she lost control of her car and struck a pole on southbound Interstate 5 near the Front Street off-ramp, Bell said. The accident occurred about 6 p.m. Wednesday.

Doyle died 29 hours later at UCSD Medical Center, Bell said.