A man carrying a bomb blew himself up in front of a police checkpoint near Bangladesh’s international airport on Friday, in a blast claimed by Islamic State.

The militant group said it killed many officers and wounded others, an account not confirmed by authorities.

The blast was the third incident involving explosives in the capital in a week.

Police shot and killed a suspected militant who tried to cross a security checkpoint on a motorcycle armed with explosives in Dhaka’s Khilgaon area on Saturday.