Police in Foyle are investigating reports of two seperate incidents last weekend which they believed are linked and come as a resault of fights being organsised through social networking,
At around 1am on Saturday morning a 28 year old man was assaulted by a group of unknown youths on the Old Strabane road, earlier there were reports of a large group of youths fighting.
The man was knocked to the ground, punched and kicked by a group of young people and is believed to have been knocked unconscious for a time.
Earlier, at around midnight on Friday police were called to reports of a large group of youths, both male and female, gathered in the Corrody Road area.
It is believed they had gathered as a result of an organised fight arranged via BlackBerry Messenge on mobile phones.
Police also received reports of damage to a number of cars on the Corrody Road where the youths had gathered.
Police believe these incidents are linked and are asking parents to be aware of the dangers associated with organising fights via social media or mobile phones.
Inspector William Mulligan urged parents to take responsibility for what their children get up to when out and about in the evenings and weekends with their friends.