MANILA - Four cockpit and 17 flight crew of the Saudia Airlines Flight SV 872, which was involved in a false hijacking alarm, underwent behavioral and tactical questioning by Philippine airport authorities Tuesday night.

According to Airport General Manager Ed Monreal and PNP Aviation Security Group Director General Mao Aplasca, the aircraft's crew members were brought to isolation at Gate 16 of the Ninoy Aquino International Airport (NAIA) as they underwent investigation.

The questioning sought to get each crew's personal account of the incident and determine lapses in basic airline protocol in handling similar situations.

Aplasca said during the press conference by airport authorities that a cockpit crew member was seen shouting at uniformed airport security and preventing them from taking videos or photos of the incident.

Investigators from the Civil Aviation Authority of the Philippines (CAAP) will summon the crew of the Saudia flight on Wednesday afternoon.