The Philippine military chief demanded Wednesday that China return rifles and other equipment seized by the Chinese coast guard in a disputed shoal and pay for damage in an assault he likened to an act of piracy in the South China Sea. Chinese personnel on board more than eight motorboats repeatedly rammed then boarded the two Philippine navy inflatable boats Monday to prevent Filipino navy personnel from transferring food and other supplies including firearms to a Philippine territorial outpost in Second Thomas Shoal, which is also claimed by Beijing, according to Philippine officials.