D.C. police have obtained a warrant for the arrest of a 33-year-old Washington man on charges of second-degree murder while armed in connection with the stabbing and shooting death of his grandfather, homicide detectives said yesterday.

Police are searching for John Maurice King Jr. stemming from the slaying of

Ernest Davis, 76, who was found about 9 p.m. Sunday stabbed numerous times in the body and shot once in the chest in his home on the 200 block of 11th Street SE, Detective George Steel said. He was pronounced dead shortly afterward at Capitol Hill Hospital.

King's grandmother, Hattie Davis, 72, was stabbed in the head, neck, hands and arms in the incident. She was listed in fair condition at the hospital yesterday.

The last known address for King, who is unemployed, is the Davises' two-story red brick row house on 11th Street, police said.

King was known to be close to his grandparents, according to police officers investigating the case. King was visiting his grandparents Sunday, as he did frequently, according to Steel, who said he obtained the information from Hattie Davis. Steel said police know of no motive for the attack. Detectives described the case as "bizarre."

"All I could hear was somebody screaming and then a gunshot," said one neighbor. "Then a little later I heard another gunshot."

The neighbor's family called police, and when officers called back to confirm the report, family members heard the grandmother screaming, said the neighbor, who did not want to be identified.

Both the Davises were disabled, and had extreme difficulty walking, neighbors said. Ernest Davis ran a fruit stand at the Florida Avenue Market until a few years ago, when he retired, neighbors said.

"They were the friendliest people on this block," a neighbor said. "They would always sit on their front porch, wave at everybody and strike up conversations."