PHILADELPHIA—Authorities in Philadelphia say they have arrested one suspect and are seeking another man who escaped from custody in the death of an elderly man shot during a home invasion last month.

Police said 80-year-old Joseph Fleming was shot twice during the May 17 attack in his southwest Philadelphia home. Authorities said he died of his injuries on Friday.

Police said an 18-year-old man was arrested soon after the crime but escaped from the Southwest Detectives Division on May 19. The Philadelphia Inquirer says police have not provided details about the escape.

Twenty-year-old Aaron Pitts surrendered to police on Friday and was charged with murder, conspiracy, robbery, burglary and other counts. A listed number for him could not be found Tuesday and it was unclear whether he had an attorney.