A suicide bomber has attacked a Shiite mosque in Kuwait, killing 27 people, the interior ministry has said.
A further 227 people have been wounded.
The so-called Islamic State militant group claimed responsibility for the attack.
Parliament member Khalil al-Salih, who was at the mosque when the attack occurred, said worshippers were kneeling in prayer when the bomber walked into the Imam al-Sadeq Mosque and detonated his explosives, destroying walls and the ceiling.
He said: "It was obvious from the suicide bomber's body that he was young. He walked into the prayer hall during sujood (kneeling in prayer). He looked ...in his 20s, I saw him with my own eyes.
"The explosion was really hard. The ceiling and wall got destroyed," he said, adding that more than 2,000 people from the Shi'ite Ja'afari sect were praying at the mosque.
The mosque preacher was quoted by state news agency KUNA as saying that the attack targeted worshippers at the back of the mosque, towards the end of the Friday prayers.
Security forces quickly sealed off the perimeter of the mosque while rescue workers carried the wounded to hospital.
The attack is the first such bombing targeting Kuwaiti Shiite Muslims, who make up around one-third of the country's native population of 1.3 million people.
