Several people have died in gunfire in the capital of Central African Republic overnight, a senior aid worker told AFP on Thursday ahead of a key UN vote due to authorise international troops to restore order in the strife-torn country. "There are dead and wounded," said Sylvain Groulx, the head of Doctors Without Borders in the country. Gunfire erupted in the capital Bangui overnight as the UN Security Council prepared to vote on a resolution to send thousands of international troops to the former French colony, which has descended into chaos after a coup in March.