Dhaka, Nov 27 (Reuters): Islamic State has claimed responsibility for an attack on a Shiite Muslim mosque in Bangladesh on Thursday in which one person died and three were wounded as they prayed.

Witnesses said three young men stormed into the mosque in north-western Bogra district and shot at worshippers indiscriminately.

”The attackers entered the mosque and opened fire on the devotees after locking the main gate and then fled immediately after the shooting,” police official Ahsan Habib said.

The attack was the second on Bangladesh’s tiny Shia Muslim community in a month.

Two people from two nearby villages had been picked up for questioning about the attack, another police officer, Arifur Rahman, said.

SITE monitoring service said that Islamic State had claimed responsibility for the attack, just as it did for the previous bombing on the biggest Shiite shrine in the country.

Muslim-majority Bangladesh has seen a rise in Islamist violence in recent months, with two foreigners, four secular writers and a publisher killed this year.

Tensions have been rising since Prime Minister Sheikh Hasina launched a crackdown on militants, putting several leaders on trial for war crimes committed during the 1971 war of independence.

About a dozen Christian priests in the north have also received death threats, a week after an Italian doctor working as a missionary was shot and wounded, police said on Thursday. ”We have already stepped up security around the churches,” local police chief Abdullah Al Faruk said.

Bangladesh's government has rejected Islamic State claims of involvement in the attacks and says local militants are involved. Critics say the government is whipping up a climate of fear to go after its political rivals.

Earlier on Thursday, police said they had killed a top militant suspected to have masterminded the October 24 attack on the Shi'ite shrine in Dhaka. They said he was the military chief of a banned underground militant group.