Sabarmati Central Jail superintendent VM Parghi said the tools used to dig the tunnel had not yet been found.
BBC: Indian officials find tunnel at Sabarmati jail
In a two-room house in Sabarmati, Mrs Goplani is mourning her husband.
BBC: News Online
The 18ft (5.4m) escape route was found in a part of Sabarmati jail that houses prisoners on trial for bombings that killed 57 people in Ahmedabad in 2008.
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