An off-duty San Diego police officer shot and wounded one of two suspects who broke into his San Ysidro home Tuesday morning, police reported. Robert Connaughy, 28, a 3 1/2-year police veteran, was awakened by his doorbell and saw two young men enter his yard. Connaughy, after phoning police for backup, stood by with his .45-caliber pistol as a window was broken and the suspects entered the house, officials said. When Connaughy identified himself, one suspect ran from the house and the other, who carried a foot-long screwdriver, lunged towards the officer in "a threatening manner," police said. Police reported that Connaughy fired twice, hitting the suspect at least once in the abdomen. The wounded man fled, leaving a trail of blood north through the neighborhood. Homicide Lt. Paul Ybarrondo said paramedics were called at 11:30 a.m. to the home of Emil Joseph Jones, 18, in the 3900 block of C Street where Jones reportedly told them he had been shot in a drive-by shooting. Mercy Hospital officials reported they admitted Jones to the hospital for a gunshot wound to the abdomen. He was reported to be in stable condition. He was arrested and booked on suspicion of burglary and assault with a deadly weapon. Police were searching for the other suspect.