Islamic State militants were involved in a grenade blast at a nightspot outside Kuala Lumpur last week, Malaysian police said on Monday.
Eight people were injured in the June 28 attack in which two suspects approached Movida Bar and Lounge in Petaling Jaya during a live Euro 2016 broadcast of a game between Italy and Spain and hurled a grenade at the 20 or so patrons gathered there.
No one was killed in the incident.
Police initially thought the attack was gang-related, but they turned their attention to possible terrorism links after a Facebook page linked to Islamic State claimed responsibility for the incident.
Two suspects were arrested last week and police were still looking for two more people believed to be involved, said police Inspector General Khalid Abu Bakar.
“The two men we arrested received orders from [a Malaysian] in Syria, Muhammad Wanndy Mohamed Jedi, who ordered them to launch attacks in Malaysia,” Khalid told reporters at the main police headquarters in Kuala Lumpur.
Khalid described the incident as the first attack in Malaysia by Islamic State militants.
"Based on our investigations, we found there is truth to the involvement of Islamic State elements in the incident," Khalid said.
Police have charged dozens of suspected Malaysian Islamic militants in the courts.
Nearly 100 Malaysians are believed to have travelled to Syria and Iraq to fight alongside Islamic State militants, Malaysia's Home Affairs Ministry said.