President Rodrigo Duterte accused the United States on Sunday of risking regional stability by building permanent arms depots in his country, and threatened to respond by scrapping a security treaty between them.

Duterte, who has made no secret of his disdain for the U.S. troop presence in the Philippines, said Washington is bringing weapons into three provinces of his country to store permanently, which he said is a dangerous breach of a defense deal between them.

"They're unloading arms in the Philippines now . . . I'm serving notice to the armed forces of the United States. Do not do it, I will not allow it," Duterte told a televised news conference.