ISIS claimed responsibility for the hacking death of a Bangladeshi doctor killed by machete-wielding attackers.Homeopathy doctor Sanwar Rahman, 55, was in Kushtia district on his way to a medical center where he volunteered his services to the poor, according to police.The attackers struck Friday when he was walking with a teacher from the Islamic University of Kushtia, reports CNN.‘They were on a motorbike and the attackers hacked them on the neck and head,’ said Proloy Chism, a district police superintendent.Rahman died on the spot and the teacher was taken to a nearby hospital with serious injuries.ISIS said its militants ‘assassinated a doctor who was calling for Christianity in Kushita,’ according to the ISIS-linked Aamaq Agency.Rahman and the injured teacher were followers of Lalon Shah, an 18th-century Bengali lyricist and secular thinker, police said.No arrests had been made in the attack.