Bloody Sunday soldiers could face arrest for murder (Top row, left - right) Patrick Doherty, Bernard McGuigan, John "Jackie" Duddy and Gerald Donaghey, (bottom row, left - right) Gerard McKinney, Jim Wray, William McKinney and John Young who were killed on Bloody Sunday A source close the police told the Sunday newspaper: "This is the beginning. It is the first time the soldiers will have been interviewed formally by police as part of a murder investigation. It is possible that some of the soldiers will be prosecuted. Most of the soldiers involved in the events of January 30, 1972 are still alive, but have never been identified for fear of reprisals. The Saville enquiry found that 26 soldiers shot at the marchers, with two of them - known only as Lance Corporal F and Soldier G - hitting between eight and 10 people. "Preliminary work has begun into what will be a lengthy and complex investigation," a spokesperson for the Police Service of Northern Ireland said. For the investigation to be as comprehensive and effective as possible, police will be asking for public support in the form of witnesses who gave evidence to the Saville inquiry now making statements to detectives. This is because police are precluded from using Saville testimony in criminal investigation. The move has already attracted criticism from some in the military, with one source close to the investigation saying: "You have to wonder whether this is fair. Is it the fault of the soldiers or the army commanders and politicians who put them there? The Saville inquiry was supposed to lay all this to rest, not start a trial process.