The family of the Batumalai brothers who were hanged in March while a clemency petition was pending, has demanded an explanation from the government.

N Surendran, the lawyer representing the family, raised the question that the law has been breached in the execution of Rames, 45, and Suthar, 40.

"On Feb 23, the family submitted a fresh clemency petition to the Negeri Sembilan Pardons Board. Despite this, the execution took place on March 15," he said at a press conference today.

Showing a copy of the clemency petition prepared by Haresh Mahadevan & Co to the media, he said the authorities, including Kajang Prison director and Home Ministry, have been notified about the petition.

"When the execution was carried out, the outcome of the petition was not known. It was still pending," he said.

He alleged that the authorities may have breached the law as the siblings were hanged without having their legal process exhausted.