A major jail break plan was unearthed in the Sabarmati Central Jail when a 18-feet long tunnel dug by Ahmedabad serial blasts case undertrials was found, jail officials said today.

"We have found a tunnel dug in the barrack where 14 of the serial bomb blasts accused are lodged. We have registered an FIR and investigation is on," said Superintendent of Sabarmati Central Jail V M Parghi.

Late last night, when jail authorities suspected something amiss in the behaviour of two inmates at barrack number four, called 'Chhota Chakkar', they searched it and found the tunnel dug from inside the barrack, police said.

"Out of 68 accused of the serial bomb blasts case, 14 were lodged in this barrack and we have started probe on since how long digging work was on, how they were digging it and who else are involved," said Parghi without divulging any further details.

While on tunnel and jail breaks watch the superlative Shawshank Redemption.