The Maharashtra ATS is likely to question alleged Indian Mujahideen (IM) members lodged in Karnataka and Gujarat jails in connection with Wednesday's serial blasts in the city.
The ATS has also sought assistance from Kolkata Police asking them to verify if any suspects had travelled to Mumbai from that city and subsequently went underground after the blasts, as part of its probe into the triple bombings, that left 19 people dead and injured over 130.
"A police team from Karnataka has come to Mumbai to help us. An ATS team from Maharashtra will also go to Karnataka and Ahmedabad to question the IM members lodged in the jails there," said a police official.
The ATS is likely to grill an alleged IM member Danish Riyaz in Ahmedabad who had been arrested there in connection with 2008 serial blasts in Gujarat.
In Karnataka, police will also question those who are believed to have an association with family members of Riyaz and Iqbal Bhatkal, the founder members of Indian Mujahideen.
