MUMBAI: Indian police released the names Tuesday of nine militants killed during their attack on Mumbai, bolstering India's charges that all of them came from Pakistan, AP reported.

At a briefing Tuesday, chief police investigator Rakesh Maria gave the names and the aliases used by the gunmen in the attacks. He also showed photographs of eight of the men  some taken from identity cards, while others were gruesome shots of the dead attackers.

No photograph was released for one of the men because his body was too badly burned, Maria said.

Maria also gave details of the districts and towns in Pakistan from where the gunmen are believed to have come. He did not say how police had tracked down their hometowns, although they have been interrogating the lone surviving gunman.

According to Times of India, three of the attackers were from Punjab’s Okara district, three from Multan, two from Faisalabad, one from Sialkot and one from Dera Ismail Khan. All of the men were between the ages of 20 and 28.

Officials at Pakistan's Foreign Ministry could not be reached immediately for comment, though President Asif Ali Zardari said last week that he doubted the gunmen were Pakistani.

Also Tuesday, Maria said sole surviving gunman Mohammed Ajmal Kasab, had asked to be allowed to write a letter to his father in which he expressed regret for carrying out the attacks.

In the letter, written in Urdu, Kasab said ‘he has been misled by these people,’ Maria said, apparently referring to those who recruited him. ‘Youngsters in the village should be told not to believe in this indoctrination,’ Maria said, reading from a copy of the letter.

India has blamed the Kashmir-based militant group Lashkar-e-Tayiba for the attacks that left 171 people dead in India's financial center last, and have demanded that Pakistan take action.

Pakistan has intensified its crackdown on the LeT by arresting 20 more people but said Tuesday it will not hand any of its citizens over to India.

The United States is pressing Pakistan to help catch those behind the attack, and avert a crisis between the rival  neighbors that could potentially harm efforts against the Taliban and al-Qaida.