Experts also warned that the incident could push China to enhance coordination between its navy and coastguard to prevent similar accidents in future.
China has yet to confirm the collision. Gan Yu, the coastguard spokesman, only mentioned a move to expel the Philippine vessel on Monday, saying China had taken “necessary” measures – including tracking, monitoring, intercepting and blocking – and describing its actions as “professional, standardised, legitimate and legal”.
He said the coastguard would continue its law enforcement activities to “safeguard national territorial sovereignty and maritime rights and interests”.
Chester Cabalza, founder and president of International Development and Security Cooperation, a Manila-based think tank, said China was likely to push for a greater maritime presence in the region to project power.