Police launched the week-long campaign on Friday, saying they were focused on arresting Islamist militants.

About 40 people, including secular bloggers, academics and members of religious minorities, have been killed in attacks in the past few years.

On Friday, a Hindu monastery worker was hacked to death in Pabna district.

Nityaranjan Pande, who was in his 60s, died on the spot after several people attacked him, reports said.