Troy Davis denies murdering Mark MacPhail
A US court has given a last-minute stay of execution to a Georgia man who was due to be put to death for the killing of an off-duty police officer.
Troy Davis, 40, was convicted in 1991 of killing a policeman in Georgia two years earlier.
The US Supreme Court has previously rejected a final appeal against the death sentence by Davis.
His sister Martina Correia said she was "ecstatic" and that movement for her brother was "building and building".
"This is going to crumble the justice system in Georgia if they don't do the right thing," she said, according to the AP news agency.
Davis was scheduled to be executed in three days, on 27 October, but the three-judge panel ordered defence lawyers and prosecutors to examine whether he could meet "stringent requirements" to pursue the next round of appeals.
Davis has been granted clemency twice before, once less than two hours before he was due to be executed.
Davis has admitted being present at the scene of the killing of police officer Mark MacPhail in Savannah, Georgia, in 1989, but always denied he was the murderer.
At his trial, nine witnesses gave evidence that he was the man who shot MacPhail, but most of the prosecution's witnesses have since recanted or contradicted their testimony.
Davis's lawyers also say post-trial information has emerged implicating another man as the gunman.
Pope Benedict XVI and former US President Jimmy Carter are among those who have appealed on his behalf.