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The coffee shop resumed work hours following the blast
The perpetrator, called Mohammed Hassan al-Wajih, 30, gave him in to the security forces which surrounded the place and started investigations into motivations and reasons behind such an attack. "Family differences were behind the attack," The official news agency (Saba) quoted an unidentified security official as saying.
The perpetrator had family differences with one of his relatives who was working in the restaurant into which the grenade was thrown, the official said.
One student, studying at the agriculture college, was immediately killed and the other was succumbed to his injuries later in the hospital, medical sources said. The sources did not identify the second man who died at the hospital.
Sources at two hospitals, Republican and Kuwait hospitals, confirmed they had received about 25 injured people including a child, some of them were in critical conditions and were under intensive care.
Eyewitnesses said, however, the perpetrator threw the hand grenade randomly into the door of the restaurant.
"While people, mostly students and bus drivers, were having their breakfast, an unknown man came up and threw a hand grenade to the door of the restaurant," said an eyewitness.Close friends to Mohammed al-Wajih said he has been suffering of psychological problems but could not imagine he would explode a grenade and kill innocent people.