MANILA - The Philippine Air Force (PAF) said it is now conducting investigations to determine the exact cause of the crash-landing of its Hermes 900 unmanned aerial vehicle (UAV) while about to land at the Lumbia Airport, Cagayan De Oro City Saturday. PAF spokesperson Col. Maynard Mariano, in a statement forwarded to reporters Saturday night, said the UAV took off at around 9:30 a.m. to perform a functional check flight (FCF). "Upon takeoff, the UAV proceeded to 5NM (five nautical miles) east of Lumbia and ascended to 10,000 ft. After finding the FCF procedure to be satisfactory, the pilots declared the termination of test and started to descend 5000 ft 1.5 miles east of Lumbia Airport," he added. At around 11:46 a.m., communication with the UAV was cut. "All emergency procedures were performed, and field service representatives were called for troubleshooting," Mariano said. He added that the Hermes 900 UAV crash-landed in a vegetated area where it was last confirm