Prosecutors in Northern Ireland have upheld a decision not to prosecute 15 soldiers for their role in the killing of 13 unarmed Catholic civil rights marchers in Londonderry by British paratroopers in 1972.
Prosecutors last year announced that there was sufficient evidence to prosecute one former British soldier, dubbed "Soldier F", for two murders, but that there was insufficient evidence to charge 16 other soldiers. One of those 16 has since died.
A number of the bereaved families and injured victims subsequently exercised their right to request a review of decisions.
"I have concluded that the available evidence is insufficient to provide a reasonable prospect of conviction of any of the 15 soldiers," Marianne O'Kane, Senior Assistant Director of Northern Ireland's Public Prosecution Service, said in a statement on Tuesday.
The prosecution of Soldier F is ongoing but has not yet reached trial.
In one of the most notorious incidents of the Northern Ireland conflict, soldiers from the Parachute Regiment opened fire on Sunday, January 30, 1972, during an unauthorised march in a nationalist area of Londonderry.
They killed 13 people and wounded 14 others, one of whom died later, in the worst single shooting incident of "The Troubles", three decades of sectarian violence involving Irish nationalists seeking a united Ireland and pro-British forces.
The 1998 Good Friday Agreement brought a close to a conflict in which about 3500 people were killed.
A judicial inquiry into the events of Bloody Sunday said in 2010 the victims were innocent and had posed no threat to the military.