The US military has begun transferring detainees to a new, high-security prison at Guantanamo Bay and will close one of the first detention camps built to hold men swept up in the war on terrorism. The first 42 prisoners assigned to the US$37 million (â‚¬28 million) facility arrived Thursday morning, said Navy Cmdr. Robert Durand, a spokesman for detention operations at the remote US naval base in eastern Cuba. The detainees were moved from Camp 3, which opened in 2002 with walls of thick-gauge, chain-link metal. The others inside that prison were transferred to other camps, allowing it to close, Durand said. Other old camps will remain open.