The U.S.-based Islamic cleric, who was accused of masterminding a failed 2016 coup in his native Turkey, has died in Pennsylvania.

Fethullah Gülen died Sunday night at a hospital near his home in Pennsylvania’s Pocono Mountains. Turkish leader Recep Tayyip Erdogan had cast Gülen as a terrorist, accusing him of orchestrating the attempted military coup on July 15,

Fethullah Gülen, the US-based Muslim cleric who allegedly masterminded the 2016 coup attempt in Turkey, has died, said a foundation in Germany linked to his movement. He was 83. Gülen died on Sunday evening at a hospital in the US state of Pennsylvania,