MANILA: The Chinese Embassy in Manila said Friday it has filed a diplomatic protest against a Philippine Coast Guard spokesman over a social media post that included cartoonish images of President Xi Jinping.

Coast Guard spokesman Jay Tarriela and an embassy official had been trading barbs since last week over issues concerning the disputed South China Sea.

The crucial waterway, which Beijing claims historic rights to despite an international ruling that its assertion has no legal basis, has been the site of repeated clashes between Chinese and Philippine vessels.

Tarriela’s Facebook post on Wednesday included a photo of him giving a speech, with a background featuring a compilation of comical images of Xi under the banner “Why China remains to be bully?“

On Friday, the embassy slammed the post for “attacking and smearing Chinese leaders” in a statement it released.