The Islamic State group has claimed responsibility for the shooting death of a Japanese national on Saturday in Bangladesh — the second foreigner to be slain there in less than a week — and promised more attacks.

The militant group issued a statement on Twitter saying it was behind the attack, according to the SITE Intelligence Group, which monitors jihadi networks. The Islamic State group had earlier claimed responsibility for the murder of an Italian citizen shot dead in Bangladesh on Tuesday. Both accounts could not be independently confirmed.

Kunio Hoshi, believed to be in his 60s, was gunned down by masked attackers on a motorcycle while en route to an agricultural project he was working on in the northern district of Rangpur, local media reported. He was reportedly shot in the head, chest and leg and died on the way to the hospital.