AVIATION police are tracking down the owner of a 9mm pistol that was found abandoned last Friday at the departure area of the Ninoy Aquino International Airport (NAIA) Terminal 3, authorities said on Monday. Four passengers were called for questioning after a Glock 19 cal. 9mm with serial number CH6743 with magazine of 16 live bullets, was intercepted at NAIA 3’s gate 2 initial security screening checkpoint. The Aviation Security Unit-National Capital Region head, Senior Supt. Adolfo Samala, said no one claimed ownership of the gun. The gun was placed in a paper bag along with make-up pouch, multivitamins, cellular phone charger and other items. Police said the owner might have totally abandoned it to avoid arrest when the paper bag was put on the X-ray security machine.