Police are determined to reunite M Indira Gandhi with her missing daughter Prasana Diksa, and have doubled their efforts to resolve the case, Abdul Hamid Bador said today.

The inspector-general of police reiterated that he was taking a personal interest in the case and hopes for “a happy ending."

"I can assure Malaysians that I am taking a personal interest in this. I want a happy ending to this episode.

"It's very sad and touches the hearts of Malaysians. We are talking about a mother (separated) from her daughter.

"I have asked my men to double their effort. The team is working on something, but I cannot reveal what," he told reporters in Kuala Lumpur.

Indira's ex-husband Muhammad Riduan Abdullah took Prasana when she was just 11 months old, and unilaterally converted all his three children to Islam in 2009.

A lengthy legal battle between Riduan and Indira ensued, involving both the syariah and civil courts.

Indira’s two eldest children now live with her, but the whereabouts of Prasana and her father remain unknown.

Hamid stressed that there is no time frame to find Riduan, but "the sooner the better."

Recently, the Indira Gandhi Action Team (Ingat) alleged that controversial preacher Zakir Naik's supporters had been one of three groups assisting Riduan.

However, Hamid said police had no practical lead on the allegation.

"I don't think there's any real practical lead on that," he said.