MANUEL MUCARI  MOZAMBIQUE  has denied accusations by rights group Amnesty International that soldiers had committed atrocities, saying the acts were carried out by Islamist insurgents impersonating troops. Militants with links to Islamic State have stepped up attacks in Mozambique this year, alarming governments across southern Africa. Amnesty said it had seen videos showing soldiers in the uniforms of the Mozambique Armed Defence Forces and the Mozambique Rapid Intervention Police committing atrocities against alleged fighters in the northernmost province of Cabo Delgado. "The videos and pictures show the attempted beheading, torture and other ill-treatment of prisoners; the dismemberment of alleged opposition…