The dissident republican group claimed responsibility at the weekend for placing the booby trap device under Ryan Crozier's vehicle.

The Omagh man sustained serious leg injuries when the bomb exploded at Spamount last Monday night.

He had been travelling from a house in the area to begin a night shift at Enniskillen PSNI Station.

Appeal

Detectives investigating the murder bid yesterday made a fresh appeal for witnesses.

Officers revisited the scene at Spamount and mounted a reconstruction of the police officer's movements on the night of the attack.

Detective Inspector Ian Magee said that the aim of the reconstruction was to "jog the memories" of local people.

"Fortunately, the injured officer is making a good recovery. He has undergone operations, including skin grafts, and is in good spirits.

"My appeal is to local people who may have noticed suspicious activity. The officer's car was not used between 6pm on Saturday, May 10 and 9pm on Monday, May 12.

"We believe that the device was placed under it sometime in this period and I am asking: did anyone see strangers, strange cars or suspicious activity in the area in this period? If you did, we want to hear from you," added Det Insp Magee.

Anyone with information has been urged to contact the incident room at Castlederg police station on 0845 600 8000, or Crimestoppers on 0800555 111.

Claiming responsibility for the murder bid, the Real IRA also vowed to continue its attacks on the PSNI.

Threat

"We reserve the right to strike against organs of the British state and its infrastructure in a manner of our choosing, at a time and place of our choosing, in the six counties and elsewhere.

"As we continue to strengthen our military capacity, this will be demonstrated," the dissident group stated.

The republican organisation said the attack showed the seriousness of its intention to kill "members of the crown forces".

Last week's bombing was the Real IRA's third attempt to kill a PSNI officer in the last six months.

In November, an off-duty policeman was shot and wounded in Bishop Street after leaving his son to school. Less than a week later another off-duty PSNI officer was shot in Dungannon.

A number of people arrested by police in connection with the latest incident were later released.