The National Investigation Agency prosecutor 'in the Mecca Masjid blast case' said today witnesses turning hostile and retraction of confessional statement by Hindu preacher Swami Aseemanand may have led to the acquittal of the five accused.

His comments come in the wake of an anti-terror court acquitting the accused belonging to right-wing organisations in the 2007 blast case.

The court, while setting them free, held that the prosecution had failed to prove 'even a single allegation' against them.

The prosecutor, N Harinath, said he was yet to receive a copy of the order from the court and a clear picture would emerge only after he gets it.

Harinath, who came attack from opposition parties following the judgement over his past association with the Akhil Bharatiya Vidyarthi Parishad, the Rashtriya Swayamsevak Sangh's student outfit, said his former links to the Hindu right organisation had got nothing to do with his current profession and the duties he was supposed to discharge.

"Out of 226 witnesses (in the case) more than 66 witnesses turned hostile in the court. They said they were never examined by police and never stated anything before police.

"So a witness, who has given evidence in favour the prosecution at the time of filing of the charge sheet, comes to the court and says that he has never given the statement... what can a prosecutor do and what can prosecution do?" Harinath told PTI.

He also said Aseemanand, who had made a confessional statement under CrPC section 164 (to a magistrate), retracted it later in a Delhi court.

Under the section, any confession or statement can be made before a magistrate in the course of an investigation.

A massive blast had ripped through the over four centuries-old Mecca Masjid on May 18, 2007, during the Friday prayers, killing nine people and wounding 58.   -- PTI