A massacre in northeast Burkina Faso in which more than 130 people were killed this month was carried out mostly by children between the ages of 12 and 14, the United Nations and the government have revealed. Armed assailants raided the village of Solhan on the evening of June 4, opened fire on residents and burned homes. It was the worst attack in years in an area plagued by jihadists linked to Islamic State and al Qaeda. Government spokesman Ousseni Tamboura said the majority of the attackers were children, prompting condemnation from the U.N. "We strongly condemn the recruitment of…