MANILA - The United States embassy in the Philippines on Tuesday warned that terrorists are planning a kidnapping spree in Palawan province.

In a travel advisory, the embassy advised U.S. citizens to avoid going to Palawan, including Puerto Princesa City and the Puerto Princesa Subterranean River National Park.

"The U.S. Embassy has received credible information that terrorist groups may be planning to conduct kidnapping operations targeting foreign nationals in the areas of Palawan Province, Philippines, to include Puerto Princesa City, and the areas surrounding Puerto Princesa Subterranean River National Park," the statement said.

"U.S citizens are advised to carefully consider this information as they make their travel plans and to review personal security plans, avoid large crowds and gatherings, and remain vigilant at all times," it added.

The U.S. embassy previously warned its citizens from traveling to central Visayas due to terrorism threats.