Sadhvi Pragya Singh Thakur and another person, arrested for their alleged involvement in the September 29 Malegaon blast, were on Tuesday subjected to narco-analysis test in Mumbai. The Sadhvi and Sameer Kulkarni underwent the scientific tests conducted by officials of the Forensic Science Laboratory in a hospital in south Mumbai, Maharashtra ATS officials said.

The tests on former army officer Ramesh Upadhyay, also arrested in connection with blast, is likely to be conducted tomorrow, they said.

The permission for the tests was given by the magistrate's court in Nashik and the trio have already undergone psychological tests like brain mapping and polygraph.

The Sadhvi was arrested after it was found that the motorcycle used in the Malegaon blast belonged to her.

The role of Kulkarni and Upadhyay has not been specified by investigators though they have been booked for their alleged involvement in the conspiracy to carry out the blast.