The China Coast Guard said that a Philippine vessel had “deliberately rammed” one of its ships on Tuesday, alleging that Manila had organized more than 10 government vessels to “illegally intrude” into waters near the disputed Scarborough Shoal in the South China Sea, just days after Beijing approved plans to turn the area into a national nature reserve.

Gan Yu, a spokesperson for the China Coast Guard, said in a statement that one of the Philippine vessels had rammed a Chinese ship in the flash point area after the Philippine ships entered the waters “from multiple directions.”

According to Gan, the Chinese side took “control measures,” issuing verbal warnings and using water cannons, as the Philippine government ship slammed into a Chinese vessel.