Relatives of six former British servicemen jailed in India have called on Prime Minister David Cameron to help free them.
They plan to deliver a 136,000-strong petition to Downing Street and want the UK government to act as a guarantor, the BBC reported.
The men had been working on a private US-owned ship providing anti-piracy protection when they were arrested over illegally possessing weapons.
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They have been in jail since October last year and have since seen a decision over their bail deferred by the authorities.
The US maritime company AdvanFort insists their ship had the correct papers.
The petition, which is to be delivered to the Prime Minister's office next Tuesday, calls for the men to be released and asks for the UK government's backing.
Billy Irving, from Connel, Argyll; Nick Dunn, from Ashington, Northumberland; Ray Tindall from Chester; Paul Towers from Pocklington, Yorkshire; John Armstrong from Wigton, Cumbria, and Nicholas Simpson, from Catterick, North Yorkshire, were arrested on October 12 and have been in prison in India since October 24.
They were working for AdvanFort providing anti-piracy protection in the Indian Ocean when their ship, the MV Seaman Guard Ohio, was detained.
The 35-member crew also included Indians, Ukrainians and Estonians.
The Indian authorities said they had intercepted the US ship and found weapons and ammunition on board which had not been properly declared.
