Dec. 5 (Bloomberg) -- Several gunmen may have survived the three-day siege of Mumbai last week that killed almost 200 people, Reuters said, citing a former CIA counterterrorism analyst.

Indian authorities have said that 10 gunmen armed with automatic rifles, grenades and explosives carried out the attacks on Mumbai and one survived.

Farhana Ali, a former analyst for the U.S. Central Intelligence Agency, said she was told there were at least 23 gunmen, without identifying the source of the information, according to Reuters. She was speaking yesterday at a briefing for U.S. government and military officials, sponsored by the Counterterrorism Foundation, Reuters reported from Washington.

Farhana, who visited India and Pakistan last month, said her information came from Pakistan and declined to give more details, Reuters reported. David Kilcullen, who has served as a counterterrorism adviser to U.S. General David Petraeus and Secretary of State Condoleezza Rice, agreed there were probably more attackers, the news agency said.

To contact the reporter on this story: Ed Johnson in Sydney at ejohnson28@bloomberg.net.

Last Updated: December 4, 2008 21:04 EST