"Yes, they were questioned. However, they do not seem to be connected (with the Delhi blast) and were allowed to go," Maharashtra ATS chief Rakesh Maria said.
The detention was on the basis of the sketches of two suspected bomb planters released by Delhi Police, he said.
The blast on September 7 at the Delhi High Court killed 13 people and injured 88. The National Investigation Agency (NIA) is probing the case.