Detectives believe a teenager has been kidnapped in a row over damage to a car.
The 16-year-old was bundled into the boot of a Volkswagen Passat in Donabate, north Dublin, in the early hours of Sunday morning after a dispute between two groups of youths.
It is believed they had been out socialising earlier in the night and an argument broke out over who was responsible for damage caused to a car.
"This is not a typical abduction," said a Garda source.
"It appears to have been spontaneous rather than premeditated.
"It seems there was damage allegedly done to one of the group's car and there was a row about who would pay for it."
The teenager was abducted from Beaverstown Road, in Donabate, shortly before 5.30am.
He was allegedly beaten and held captive until 9am when he was released near the M50 at Clondalkin.
After making his whereabouts known, he was taken to Beaumont Hospital to be treated for minor injuries and was released around midday.
Investigating gardai arrested a 19-year-old man in Clondalkin.