Sayeed Mohammed Noushad, Ahamed Bava Aboobakkar and Fakeer Ahamad were given life terms by AdditionalDistrict and Sessions Judge S H Pushpanjali Devi.
The accused, residents of Mukkachery and Chembugudde of Ullal village of Mangaluru Taluk, were arrested in 2008 and explosive materials seized from their houses.
The prosecution had charged them with conspiracy to commit unlawful activity, which would have taken lives of many innocent people, but for timely police action.
Fakeer Ahamad was sentenced to an additional life term under Section 6 of the Explosives Act.
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Noushad was also sentenced to seven years of imprisonment and slapped with a fine of Rs 5,000 for offenceunder Section 420 (cheating) of the IPC, three yearsimprisonment and a fine of Rs 3,000 each for offences underSections 468 (forgery for the purpose of cheating) and 471(using as genuine a forged document) of the IPC.
The judge said the life sentences would runconcurrently.