BEIJING - Chinese foreign ministry on Sunday strongly protested over Indonesia navy warships' harassment of Chinese fishermen in the South China Sea.

Chinese fishing boats were harassed and shot at by several Indonesian navy warships in a disputed fishing ground in the South China Sea on Friday. One crew member was injured. Another fishing boat and seven crew were detained.

"China strongly protests and condemns such excessive use of force," spokesperson Hua Chunying said in a press release.

The incident took place in a traditional Chinese fishing ground where China and Indonesia have overlapping maritime rights claims.

Indonesia's actions violated international laws including the United Nations Convention on the Law of the Sea (UNCLOS), as well as the Declaration on the Conduct of Parties in the South China Sea (DOC), and harmed the lives and property of Chinese fishermen, Hua said.

"China urges Indonesia to stop taking action that escalates tension, complicates issues, or affects peace and stability," Hua said.