A HAMAS GUNMAN WAS KILLED AND A SENIOR PALESTINIAN SECURITY OFFICIAL FROM A FORCE LOYAL TO PRESIDENT MAHMOUD ABBAS WAS WOUNDED IN GAZA ON WEDNESDAY, REUTERS REPORTED. SECURITY SOURCES SAID THE GUNMAN WAS SHOT DEAD AFTER HE AND OTHER MASKED ACTIVISTS AMBUSHED A CAR CARRYING THE OFFICIAL, REFAT KULLAB, WHO HEADS THE PREVENTIVE SECURITY SERVICE IN THE SOUTHERN TOWN OF KHAN YOUNIS. OFFICIALS FROM THE RULING HAMAS MOVEMENT SAID PREVENTIVE SECURITY MEMBERS IN KULLAB'S CAR FIRED FIRST. KULLAB WAS WOUNDED IN BOTH LEGS AND WAS IN A MODERATE TO SERIOUS CONDITION IN HOSPITAL, THE SECURITY SOURCES SAID.