At least 33 people died after a co-ordinated car and suicide bomb blast in Baghdad.
The devices went off outside a Shi’ite mosque on Wednesday as worshippers were leaving evening prayers.
As onlookers rushed to help the wounded, a suicide bomber blew himself up in their midst.
Police saw a second man fumbling to detonate an explosive belt and managed to stop him, but an angry mob overcame them and stabbed the would-be-suicide bomber to death.
It is unclear who was behind the attack but Sunni Islamist militants, who regard Shi’ites as non-believers, have been regaining momentum and striking on a near daily basis this year.