A former IRA bomber and senior republican from north Belfast has been released unconditionally after being arrested for questioning about a shooting earlier this week.
Sean Kelly had been detained after an 18-year-old man was shot several times in Ardoyne on Tuesday night.
The teenager was left in a critical condition after being shot three times in the upper leg, but his condition is now said to be stable.
The incident was originally reported to a paramilitary style punishment attack, but police say it is being treated as a shooting.
Mr Kelly was given nine life sentences for the Shankill Road fish shop bombing in 1993 in which nine people died.
He was released from prison in July 2000 under the terms of the Good Friday Agreement.
Stormont First Minister and DUP leader Peter Robinson said the arrest raised potentially grave consequences for the peace process.
Stormont Deputy First Minister Martin McGuinness of Sinn Féin condemned the shooting, but said the assertion that it could threaten the political process was ridiculous.