A Hindu priest was stabbed to death at a temple by suspected militants while another devotee who went to his aid was shot and wounded on Sunday in Bangladesh.
Bangladesh has experienced a wave of militancy in recent months, including a series of bomb attacks on mosques and Hindu temples.
The attack was launched by a local militant group according to police, while DAESH claimed responsibility in a statement posted on social media.
Police said five or six attackers slit the throat of the priest Jogeshwar Roy, 55 as he was organising worship at the Deviganj temple near Panchagar, 494 km (308 miles) north of Bangladesh's capital Dhaka.
"We suspect that they might be members of the banned Islamist militant group Jamaatul Mujahedeen Bangladesh [JMB]," police official Humayun Kabir told Reuters.
Several similar attacks have been claimed by DAESH, which has said it is behind the killing of a Japanese citizen, an Italian aid worker and a policeman in Bangladesh.
DAESH released a statement claiming responsibility for the attack through the Telegram messaging app and on Twitter.
"In a security operation facilitated by the almighty God, soldiers of the Caliphate liquidated the priest Jogeshwar Roy, the founder and the head of the Deviganj temple that belongs to the infidel Hindus," DAESH's statement read in Arabic.
"One of his companions was hurt after being targeted with light weapons in the area of Panchagar in Northern Bangladesh, and the Mujahdeen returned to their positions unharmed, and all praise be to God."
Police official Kabir said the devotee who tried to stop the priest's attackers was also shot in the leg before the group escaped. Police have not yet made any arrests.
Bangladesh's government denies that DAESH has a presence in the country of 160 million people. Police have blamed earlier attacks on local militants.