The Philippine president warns China not to cross a red line as their standoff in the South China Sea escalates.

The death of any Filipino citizen at the hands of another country in the South China Sea would be “very close” to an act of war, Philippines President Ferdinand “Bongbong” Marcos Jr. warned Friday as his nation faces increasingly fraught clashes with Chinese vessels in the South China Sea.

Marcos was asked if a “red line” would be crossed if Chinese Coast Guard water cannons killed a Filipino sailor.