OUAGADOUGOU (Reuters) -Armed men killed at least 100 civilians in a rural district of northern Burkina Faso over the weekend, a local and a security source said on Monday. The attackers struck on Saturday night in Seytenga commune, part of Seno province, which lies in borderlands where militants linked to al Qaeda and Islamic State are waging an insurgency. One security source told Reuters at least 100 people were killed. A local source who did not wish to be named said the provisional death toll stood at 165. The United Nations condemned the attack that “claimed many victims” in a statement o…