According to the PMO, "desired information was not available", official sources said.
The commission, headed by Justice (retd) S L Kocchar held a hearing yesterday. Earlier, it had written to PMO and Union Home Ministry seeking the information. Home Ministry has not yet responded.
Justice Kocchar also directed commission officials to write to Union Cabinet Secretariat to find out whether on December 7, 1984 the then Cabinet Secretary gave any directions to the State Chief Secretary Brahma Swaroop and whether any record of the same was available. The same information has also been sought from Madhya Pradesh Chief Secretary's office.
Earlier yesterday, former Chief Minister Arjun Singh's secretary, N R Krishnan, deposed before the commission.
On the night of 2-3 December, 1984, lethal gas leak from Union Carbide's pesticide plant in Bhopal killed at least over 2,500 people, and injured thousands of others.
It is alleged that Anderson, who visited Bhopal after the disaster, was allowed to return to Delhi by a state plane, from where he left the country for US, never to return despite warrants by Indian courts.