Police in Northern Ireland have made a breakthrough in one the deadliest shootings of the Troubles: the Kingsmill massacre.
But four decades after the murder of ten textile workers - and just a week after a new inquest into their deaths was launched - relatives of the victims have voiced concerns about the timing of the discovery.
What happened?
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On 5 January 1976, camouflaged gunmen armed with automatic rifles ambushed a minibus filled with factory workers travelling home near the village of Kingsmill in County Armagh.
They ordered the only Catholic to flee while ten other men, all Protestants, were lined up against the bus and gunned down. One man survived the attack, despite having been shot 18 times.
The atrocity was claimed by a group called the South Armagh Republican Action Force in revenge for a loyalist sectarian double murder in the county, The Guardian reports.
"However, republican and security sources down through the decades have said the IRA was behind the Kingsmill killings, even though the organisation has never publicly admitted it," the paper adds.
What has happened since?
Forensic scientists reviewing the case have linked a palm print found on the getaway van to a set of fingerprints, identifying a potential suspect. News of the discovery comes just a week after a long-awaited inquest into the massacre began in Belfast. The bereaved relatives had been fighting for 13 years for a fresh inquest, which was finally ordered in 2013.
The criminal investigation has now been reopened, with coroner Brian Sherrard describing it as a "massive development" in the case.
Assistant Chief Constable Mark Hamilton said the new line of inquiry was possible due to a "recent forensic development".
What has the reaction been?
Relatives of the victims reported mixed feelings. Colin Worton, whose 24-year-old brother, Kenneth, was among those killed, said one of the worst emotions he has experienced is one of anger and questioned why the discovery had taken more than 40 years to come out.
The sole survivor of the massacre, Alan Black, also questioned the timing. "It's nearly unbelievable that they had it all this time and now, when we're into the inquest, they suddenly find a match," he told the Belfast Telegraph. "It's unbelievable they couldn't have done this before."
ACC Hamilton acknowledged "this is very difficult time" for Black and the families of the victims, but insisted the Police Service of Northern Ireland was "committed to progressing this matter as expeditiously as possible and will keep them updated as appropriate".
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