As of 6 December, there are at least two groups of possible Indian collaborators being investigated.out of which one part is Surveillance team-:
Faheem Ahmed Ansari, an Indian from Mumbai, is a suspected collaborator. His group of six Indian men were initially arrested in connection with an attack on a police station in northern India. Ansari had also carried out reconnaissance of targets in Mumbai earlier in the year. He was caught with hand-drawn sketches of 8 to 10 Mumbai landmarks.This group said they had been directed by two Lashkar-e-Taiba leaders: Zaki ur-Rehman Lakhvi, and a man known alternately as Yusuf or Muzammil -- the same people who directed the Mumbai attackers by phone from Pakistan.
Faheem Ahmed Ansari - Under arrest in India - Indian citizen, resident of Goregaon. Arrested in Rampur, northern India, in February 2008 with hand-drawn maps, sketches of targeted sites. Ansari worked in Saudi Arabia in 2006, from where he said he was recruited by the Lashkar-e-Taiba and given a Pakistani passport, then trained in Pakistan. Claims to have carried out reconnaissance in the fall of 2007 against 8-9 targets including the attacked hotels, the U.S. Consulate, the Mumbai stock exchange, and other sites. Named Yuuf Muzammil as his Lashkar-e-Taiba handler in Pakistan, and claimed to have been trained in Muzaffarabad, Pakistan.
A senior STF officer said, "Fahim guided the ATS to all the attack sites, particularly the Taj and CST, which he'd surveyed. He had sent the information by e-mail to somebody in Pakistan." The report went on to say, "Fahim used more than 16 e-mail accounts to communicate with his handlers. He sent them nine scanned copies of handmade maps. His disclosures were later cross-checked with another Pakistani militant Sabauddin, who was arrested for the Rampur attack."