Beijing and Manila have exchanged fresh accusations over a clash in the South China Sea, just as China’s top diplomat is due to attend the Asean foreign ministers’ meeting in the Philippines. On social media late on Monday, the China Coast Guard said that at around 9am that morning as a small Chinese coastguard vessel was patrolling near Second Thomas Shoal, two rubber dinghies were launched “illegally” from the Philippine Navy’s BRP Sierra Madre, a vessel grounded on the shoal by Manila about...