Lynas last week rejected a $1.1 billion takeover offer from Australian conglomerate Wesfarmers Ltd, though Wesfarmers said they remain keen on the talks.

Lynas operates an $800 million plant in the Malaysian town of Kuantan that refines ore from a rare-earths mine that it owns in Australia. Malaysia has recently halted the renewal of its operating licence over concerns about how it handles radioactive wastes at the site.

In a televised media briefing after a cabinet meeting on Friday, Malaysian Prime Minister Mahathir Mohamad said other companies could be interested in Lynas.

"We have opened up the business to other people, and there are other companies willing to acquire Lynas," Mahathir said.

Mahathir did not name the companies interested in purchasing Lynas.

"They have given us a promise that in the future before sending the raw materials to Malaysia they will clean it up first. They will crack it and decontaminate it in some way with regard to radioactivity," Mahathir said.

He added that the company, or even Lynas, would be able to operate in Malaysia if they promise that raw materials coming to Malaysia are cleaned.

Lynas said in a statement late on Friday that it is seeking clarification from the government and will provide an update when further information is available.

In December, Malaysia's Energy and Environment ministry required Lynas, the only rare earths producer outside of China, to remove the accumulating radioactive wastes to qualify for a renewal.

Mahathir said Lynas had intended to send the waste back to Australia but the country does not want to accept it.

Rare earths are speciality metals used in everything from ceramics to magnets and consumer electronics.

(Reporting by Joseph Sipalan and Liz Lee; Editing by Christian Schmollinger and Muralikumar Anantharaman)