U.N. concerned by Islamic State's ability to unite Afghan insurgents

UNITED NATIONS (Reuters) - The United Nations is concerned by the presence of Islamic State in Afghanistan but says the militant group's power to unite insurgents is more significant than its capabilities in the war-torn country, a top U.N. official said on Monday.

U.N. envoy Nicholas Haysom briefed the U.N. Security Council on Afghanistan, where attempts are under way to broker an end to 13 years of conflict between the Taliban, who were ousted in a U.S.-led war in 2001, and Afghan and foreign forces.