The two owners of a fireworks warehouse that exploded recently in Narathiwat have been hiding out in Malaysia, police confirmed on Thursday. Their business is allegedly connected to influential figures in the southern Thai province, reports said.

Police told the media that Sompong Nakul, 42, and his wife, Piyanuch Peungwirawat, 42, have not contacted officers to turn themselves in.

The couple were summoned due to the explosion at their warehouse on July 29 which killed 12 people, injured 121 and damaged 292 houses.

A source said the couple are backed by local politicians whose business involves smuggling fireworks, cigarettes, liquor, drugs and workers.

The source mentioned that, back in 2016, they had been arrested for storing and selling 60 tonnes of fireworks and other flammable materials without a permit. However, the prosecutor did not file the case with the provincial court.

Narathiwat's governor said most of the injured victims had returned home from the shelter as they were concerned about their property.

He said boxes of donations have been installed in front of the survivors' houses after some donors complained they were sceptical about donations made via less than transparent public agencies.

Prime Minister Prayut Chan-o-cha will reportedly fly to Narathiwat on Friday to visit the site.