The fragment was handed over by Thailand’s security authorities.

Inspector-General of Police, Khalid Abu Bakar said the fragment of the mobile phone had the Malaysian Communications and Multimedia Commission’s (MCMC) serial number on it.

“We are willing to give full cooperation to Thailand’s authorities to facilitate investigations into the incident,” he told Bernama via WhatsApp application, here last night.

In a Bernama report yesterday, Thailand’s security forces said they were seeking Malaysia’s cooperation to identify the origin of the mobile phone following the presence of the MCMC’s serial number on it.

The fragment was an important piece of evidence in the investigations to identify and track down the perpetrators responsible for the bomb blast, said the source.

Mobile phones were used to activate or detonate homemade improvised explosive devices (IED) in a series of bomb blasts which rocked Thailand’s southern provinces.

On Friday, two homemade bombs exploded in the popular island resort of Phuket, one each in Patong and Kathu at 7.45am and 8.45am (local time).

One person suffered a minor injury.