An adult was caught supplying liquor to a minor and 73 drivers were caught drink driving throughout Queensland during the nationwide Operation Unite on Friday night.

On the opening night of the blitz Queensland police attended 867 licensed establishments and detected 101 licensing breaches, handed out 156 liquor infringement notices and forced 135 people to move on.

Apart from the crackdown on alcohol-related violence, police also dealt with a number of juveniles during the operation. A dozen juveniles were arrested, nine were cautioned and seven issued with Notices to Appear.

A police spokeswoman said the details relating to the adult supplying liquor to a minor were not available but the incident occured in Townsville.

Police Minister Neil Roberts said the police presence confirmed the government's stance to eradicate alcohol-related violence.

"This type of behaviour is unacceptable and Operations Merit and Unite demonstrate that the Bligh government and Queensland Police Service are responding proactively to the issue," he said.

Police performed more than 7,300 random breath tests with one per cent of those tested found to be over the limit.