PETALING JAYA: A 9mm semi-automatic pistol is believed to have been used in the shooting at the arrival hall at Kuala Lumpur International Airport (KLIA) Terminal 1 here on Sunday.
"We believe the gun was obtained illegally from a neighbouring country," Inspector-General of Police Tan Sri Razarudin Husain said when contacted.
"During our sweeps at the crime scene, we found two bullet casings and one (unspent) round," he added.
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Razarudin said security at the borders has been heightened.
"Our personnel at... the borders are on high alert in case he tries to escape," he added.
It was reported earlier that a bodyguard was shot and seriously injured at about 1.30am.
It was believed that the target was a woman awaiting the arrival of an umrah group.
The public is urged not to approach the suspect, or to take the law into their own hands.
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Bukit Aman Criminal Investigation Department (CID) director Comm Datuk Seri Mohd Shuhaily Mohd Zain told a press conference at KLIA that police are seeking one Hafizul Harawi, 38.
Hafizul has also been identified as the husband and business partner of the intended victim, and is classified as armed and dangerous.
Anyone who spots him is urged to call the police and not to act alone.