Like many Asian economies, South Korea has faced mounting risks to its energy supplies since US-Israeli attacks on Iran in late February prompted Tehran to effectively close Strait of Hormuz.

Malaysia's Prime Minister Anwar Ibrahim said he had obtained an assurance from Petronas on the matter following discussions with his Australian counterpart Anthony Albanese on boosting agricultural and fuel trade.

The case went viral after screenshots of vulgar remarks and sexually explicit jokes targeting at least 20 female students and seven lecturers, allegedly from a student chat group, were shared online.

A recent fuel surcharge hike of up to 38 per cent announced by the government has sent airfares rocketing, disrupting travel plans and fuelling backlash online.   

"The equipment was taped to the bodies of the suspects," a customs spokesman said, noting the haul was valued at 24 million rupees (US$78,000) and was confiscated.