Drink-fuelled "one punch" attacks have caused about 20 deaths in Northern Ireland since 2004, it was revealed.
With the Christmas party season approaching revellers have been warned of the dangers.
PSNI detective chief inspector Karen Baxter said: "Unfortunately the majority of one punch incidents are fuelled by excessive alcohol consumption and can have a devastating impact on the victim and their family.
"In such cases the offender will likely face a murder or manslaughter charge and have a criminal record for the rest of their life.
"This type of conviction can impose significant restrictions on an individual's future."
Since 2004, 21 people have died through one punch attacks and many more have been seriously injured.
Police have launched a One Punch Can Kill video targeting young males aged between 15 - 25 and highlighting the risks of getting involved in an argument or fight which could ultimately lead to serious injury or death.