Maharashtra Anti-Terrorism Squad (ATS) sleuths are on the lookout for three persons after an autorickshaw driver claimed to have overheard them discussing something "unusual" in his vehicle. The trio also mentioned the name of Ajmal Amir Kasab, a Pakistani national involved in dreaded 26/11 terror attack in Mumbai, in their discussion.

According to the ATS sources, the driver (name withheld), a resident of Mulund, informed Mulund police that around 7.30 pm on Saturday he had ferried three persons, who were carrying backpacks, from Sion to Airoli.

"As per the driver, during the journey, the youths were speaking something very unusual," said an ATS official.

The driver told the police that one of the three youths said, "Agar main yeh kaam kar liya toh mere family ka kya hoga" (If I would do this job then what will happen to my family), to which one of the other two said, "Kuch nahi hoga...aaka hai...Kasab ka family changa hai..." (Nothing will happen to them....boss is there...Kasab's family is fine).

"From the discussion it transpires that one of the three was worried about his family if he does the job and another was convincing him that nothing will happen to the family as boss his there and also gave reference of Kasab to convince the person," said another official.

Based on the description provided by the auto driver, the Mulund police have prepared sketches of the suspects. "We are trying to find and identify them with the help of CCTVs in Sion and Airoli localities. Though we don't have anything concrete yet, the discussion suggests that the passengers could well be terror operatives," the officer said.

Vikhroli unit of the ATS has been asked to probe the matter.