CNN  — 

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.

“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.

The grisly attack was the latest in a series of murders that have targeted minorities, secular thinkers, followers of other religions and LGBT activists in Bangladesh. Earlier this month, a 65-year-old Sufi Muslim spiritual leader was hacked to death.

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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.

CNN’s Hamdi Alkhshali contributed to this report.