The southern U.S. state of Georgia has carried out a controversial execution.
Troy Davis was put to death by lethal injection after the Supreme Court rejected a final appeal.
The 42-year-old Davis was convicted of murdering a policeman in 1989.
His lawyers had questioned the conviction, as several witnesses at the original trial had since recanted their testimony and no DNA evidence conclusively linked Davis to the murder.
The case attracted international attention and an online protest that accumulated nearly a million signatures.
Till the end, Davis denied committing the crime.
compiled from agency reports