Constable Peadar Heffron was driving to work when the bomb exploded
A police officer injured in a dissident republican car bomb attack last week has had his right leg amputated.
Constable Peadar Heffron, 33, had surgery on Tuesday and remains critical, but stable.
He was injured when a bomb exploded under his car on the Milltown Road near Randalstown in County Antrim at about 0630 GMT on Friday.
The officer is an Irish language specialist for the PSNI and captain of the PSNI GAA team.
Mr Heffron has been in the police for 10 years and recently married. He is related to a senior Sinn Fein member.
He had been on his way to work at Woodbourne police station in west Belfast.
It is believed Constable Heffron had driven about a mile from his home when the bomb exploded and he was found breathing and conscious but bleeding heavily.
Dissident republicans have been blamed for the attack, but police have not yet said which grouping they believe were behind it.
Dissident republicans have been responsible for a spate of bomb attacks across Northern Ireland in the last year.
In October, a dissident group planted a bomb under a policeman's car in east Belfast.
His partner suffered minor injuries in the attack.