IS leader Abu Bakr Al-Baghdadi has appeared in a video for the first time in five years.
Posted on the militant group's al-Furqan media network on Monday, Baghdadi announced that the Sri Lanka attacks were carried out as revenge for the fall of the Iraqi town of Baghuz.
He's sporting a bushy grey and red beard, wearing a black robe with a beige vest and seated on the floor with what appears to be a machine gun propped up next to him.
Baghdadi also referred to the political crisis in Algeria and Sudan.
The tapes are set to be inspected by analysts to ascertain its authenticity.

Israeli fire kills four in Gaza and the West Bank, medics say
Spain closes airspace to US planes involved in Iran war, El Pais says
UN peacekeeper killed in southern Lebanon after projectile explosion
Iranian attack kills one in Kuwait, damages distillation plant
Iran accuses US of ground assault plans as Pakistan hosts regional talks
Heavy rain, floods kill 22 people in Afghanistan
Fugitive accused of killing two Australian police officers shot dead
Netanyahu orders expansion of security buffer zone in southern Lebanon
