Police in Derry and Strabane have seized 125 items of of alcohol following a Snapper Operation last weekend.
Police say seven people will be reported to Derry City Council in relation to breaches of the on-street drinking bye laws.
One male was arrested for obstruction and resisting arrest.
Operation Snapper was carried out on Friday and Saturday.
The 125 items of alcohol included beer, spirits, alcopops and 35 litres of cider.
Inspector Jon Burrows said: “It is very disappointing that young people are found in possession of strong alcohol. Police are committed to making sure young people are not getting mixed up with alcohol and will seize it if they are found drinking on the streets or public places.
“Alcohol affects everyone differently and even one can of beer or glass of vodka can leave young males or females vulnerable. The abuse of alcohol is also associated with anti-social behaviour and criminal damage and these are issues of concern the public have asked us to address.
“We would appeal to parents to talk to your children about the real dangers associated with alcohol and take all necessary steps to ensure your kids are not getting mixed up in behaviour that could see them brought home by police officers. Any young person found in possession of alcohol will be reported”
Police ay they will carry out similar operations during the summer months.