Abdul Rahim Jaafar, state deputy police chief, told AFP that the attack on the Movida restaurant in busy Puchong district was probably the result of a business conflict or revenge.
Shop targeted: Three injured in grenade attack
"Eight people were injured in the hand grenade attack early Tuesday. One of them, a man, is in serious condition," he said.
Abdul Rahim said initial investigations revealed that the assailant threw the explosive at a particular couple in the outlet.
"I rule out terror attack. The blast is likely motivated by business rivalry among the local gangsters or a revenge attack," he said.
Grenade attack on JuD madrassa leaves several injured in Peshawar
News reports said the blast occurred when some 20 patrons in the restaurant were watching Italy play Spain in the Euro 2016.
In a similar attack in 2014, a Malaysian man was killed and 13 people, including Singaporean, Thai and Chinese tourists were injured, after a bomb exploded in front of a pub in Kuala Lumpur.
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