GENEVA (Reuters) -The U.N. refugee agency (UNHCR) called on Friday for urgent support to some 16,000 newly displaced people who fled one of Burkina Faso’s deadliest militant attacks last weekend that left at least 100 people dead. Soldiers have recovered 86 bodies since the attack on Saturday night in the northern province of Seno, the government said, although sources told Reuters that at least 100 people had died and possibly many more. The government said in a statement it was investigating whether some bodies had been taken away or buried by families. It was the deadliest attack in at leas…