At least three people were killed and two others injured Thursday night in a grenade attack in Bosaso, the commercial citu of Somalia’s northeastern Puntland region, police said.

Mohamed Jama, a police officer in Bosaso, confirmed the incident on Friday.

The attackers hurled hand grenades at security officers at a checkpoint in Bosaso, killing one soldier and two civilians, Jama told media.

Al Shabaab has claimed responsibility for the attack.

Bosaso has seen several such attacks in recent months, all conducted by the al-Shabaab militant group