KINSHASA — More than 300 people, including opposition leaders, remain in detention in Democratic Republic of Congo after protests last month, reinforcing concerns that President Joseph Kabila plans to cling to power beyond his legal mandate. Kabila is constititionally barred from seeking a third term next year after winning disputed elections in 2006 and 2011. With growing signs of popular opposition to any attempt to prolong Kabila's mandate in the vast central African country, his ruling coalition has been weakened by a string of high-profile defections, particularly in his home province of Katanga. — Reuters