Five people have been arrested in connection with a suspected plot to use explosives made from fireworks to disrupt the G20 summit.

The three men, aged 25, 19 and 16, and two women, both 20, all live in Plymouth and the surrounding area. They are political activists unaffiliated to any terrorist organisation, and were arrested at addresses in Plymouth. They are being held under terrorism legislation. The explosive devices were made from simple fireworks, police said.

The Army general who led the investigation into prisoner abuse at Iraq’s Abu Ghraib prison accused the Bush administration Wednesday of committing “war crimes” and called for those responsible to be held to account.

“After years of disclosures by government investigations, media accounts and reports from human rights organizations, there is no longer any doubt as to whether the current administration has committed war crimes,” Taguba wrote. “The only question that remains to be answered is whether those who ordered the use of torture will be held to account.”

Shane O’Sullivan, the producer of a recent documentary on the assassination, told CNN, “There hasn’t really been a serious re-investigation of the ballistics in this case since 1975. … There’s new audio evidence .. which suggests that 13 shots were fired, eight from the front … and five from the back.”

Civil rights leader Martin Luther King was assassinated in Memphis, Tennessee, 40 years ago on 4 April 1968.

A year later, James Earl Ray admitted to being the assassin. Because of that guilty plea there was no full trial. But Ray changed his story almost at once and until his death in 1998 insisted he did not murder Dr King. So was he the killer? And if so, did he work alone?

The almost fanatical zeal with which the FBI pursued King is disclosed in tens of thousands of FBI memos from the 1960s.

The FBI paper trail spells out in detail the government agency’s concerted efforts to derail King’s efforts on behalf of the civil rights movement.

The FBI’s interest in King intensified after the March on Washington in August 1963, when King delivered his “I have a dream speech,” which many historians consider the most important speech of the 20th century. After the speech, an FBI memo called King the “most dangerous and effective Negro leader in the country.”

Don’t forget this CNN story from 1999