Cheras police chief Zam Halim Jamaluddin told FMT that the 36-year-old man was arrested in Ampang, with a magistrate allowing a seven-day remand until March 20.

The whereabouts of the other suspect, another Myanmar man, is yet to be known.

The Rohingya woman, who is a United Nations High Commissioner for Refugees (UNHCR) cardholder, was set alight by two men at a playground in Cheras last Saturday.

Police had earlier said the woman had bought the petrol in a bottle for the men.

She suffered almost 30% burns to her face and body and is still receiving treatment at a government hospital.

Her child, who was with her during the incident, sustained minor injuries.