Islamabad, Aug 7 - The Taliban chief of Pakistan, Baitullah Mehsud, might have been killed along with his wife and bodyguards in a drone attack two days ago, Interior Minister Rehman Malik said Thursday night.

'We suspect he (Mehsud) was killed in the missile strike. We have some information, but we don't have material evidence to confirm it,' Malik was quoted as saying by Geo TV.

A US official has also said there was 'reason to believe reports of his death may be true, but it cannot be confirmed'.

Pakistani officials on Wednesday had said Mehsud's wife had been killed in a missile attack from a US drone in the northwestern South Waziristan tribal region.

On Sunday, Pakistan had offered a $615,000-reward for information leading to the capture, dead or alive, of Mehsud, who is blamed for the deaths of hundreds of people in terror attacks over two years.