A Philadelphia man suspected in the shooting of a Kmart manager on a store loading dock has committed suicide.

Officer Tanya Little, a Philadelphia police spokeswoman, says a gunshot went off in a second-floor bedroom as officers entered Daryl Anthony Birch's North Philadelphia home at about 7:45 a.m. Wednesday.

Little says Birch shot himself in the head.

Officers had been searching for the 30-year-old Birch since about 9:30 a.m. Tuesday.

Police say Birch shot a 35-year-old Kmart manager three times. Investigators say the gunman was arguing with his girlfriend, a Kmart employee, and opened fire, striking the manager as he intervened.

The manager is reported in critical condition at Frankford-Torresdale Hospital and is expected to survive.

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