Police in Bangladesh say an explosion in a mosque of a minority Muslim sect has killed a suspected bomber and wounded three other people in the country's northwest.

Local police chief Motiar Rahman says the blast appears to be a suicide attack by a young man during Friday's weekly prayer in the mosque in Bagmara area in Rajshahi district.

The area is 240 kilometers ( 150 miles) northwest of the capital, Dhaka

Rahman says the man died in the explosion. The minority Ahmadiya sect appeared to be the target of the attack.

Rahman says the villagers couldn't recognize the dead as he appeared to have come from elsewhere.

Bangladesh has some 100,000 Ahmadiyas among its 160 million people in a Sunni-majority nation.