MANILA - The Philippine government is working to improve security measures at Ninoy Aquino International Airport (NAIA) following the review of the United States' Department of Homeland Security, the Department of Transportation (DOTr) said Wednesday.

This, after a travel advisory against the Manila airport was issued by Homeland Security’s Transportation Security Administration (TSA).

In a statement, the DOTr said it is working with the Manila international Airport Authority (MIAA) and the Office for Transportation Security are "giving utmost priority and attention to the implementation of strict security measures" at NAIA.

"Rest assured that the government, the DOTr, the MIAA and the OTS are fully committed in employing all measures available to ensure the security and safety of the traveling public," the agency said.

According to the DOTr, the TSA recommended the installation of new x-ray machines, walk-through metal detectors, and alarm systems.

The DOTr said the equipment is expected to be installed in the second quarter of 2019.

Meantime, Transport Secretary Arthur Tugade has ordered the hiring of additional airport contracted guards for round-the-clock duty.

Re-training is also underway for long-time NAIA personnel as the TSA recommended stricter implementation of security procedures.

It also recommended new background check procedures for newly-hired personnel, the DOTr said.