The Philippines and the United States will meet this month to iron out differences over a two-decade-old Visiting Forces Agreement (VFA), Manila's top diplomat said, amid renewed concerns in the region over China's assertive maritime agenda.

The Philippines in November suspended its decision to terminate the VFA for a second time to allow it to work with Washington on a long-term mutual defense pact.

"The suspension was intended that we should continue working and I am narrowing down the issues and soon we will meet ... and iron out whatever differences we have," Foreign Affairs Secretary Teodoro Locsin told ANC news channel on Monday, adding a meeting was likely in the last week of February.