Police investigating a sectarian attack that left its victim with permanent brain damage have arrested three men.
Paul McCauley, 34, was attacked by a loyalist mob at a barbecue in the Waterside area of Londonderry in July 2006.
Officers investigating his attempted murder have arrested three men in the city over the attack.
The men, all in their 20s, are being questioned at Strand Road police station.
Mr McCauley was at the event in Chapel Road, Derry, which was organised for a friend who was leaving to teach abroad, when the party-goers were set upon.
The victim was knocked to the ground by a gang of around 15 people and his head was kicked and stamped on, causing major injuries.
Relatives have said he is unable to move or communicate, and requires constant care.
Only one of the gang has been brought to justice. In 2009 a teenager pleaded guilty to grievous bodily harm with intent and was sentenced to 12 years in a young offenders centre.
The trial judge said at the time that the attack was "undoubtedly sectarian" and added that the attackers targeted Mr McCauley and his friends because they believed them to be Catholic.
Last week the McCauley family and the police appealed for the public to help gather evidence against those responsible for the murder bid.