ROCKET PROPELLED GRENADES WERE FIRED TUESDAY AT A SECURITY COMPOUND IN THE GAZA STRIP, MODERATELY WOUNDING THREE MAINTENANCE WORKERS, SECURITY AND HOSPITAL OFFICIALS SAID. IT WAS NOT IMMEDIATELY CLEAR WHO FIRED THE GRENADES AT THE PREVENTIVE SECURITY BUILDING. THE AGENCY IS LOYAL TO PRESIDENT MAHMOUD ABBAS AND HAS BEEN AT THE CENTER OF A POWER STRUGGLE BETWEEN ABBAS AND HAMAS, THE ASSOCIATED PRESS REPORTED. SECURITY PERSONNEL FIRED AT THE ATTACKERS, BUT THE ASSAILANTS ESCAPED, OFFICIALS SAID.