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Police have charged two teenagers over an alleged stabbing at a house party attended by 80 youths on the New South Wales central coast on Friday night.

Emergency services were called to a property on Palm Valley Rd near Coolong Close in Tumbi Umbi at about 8pm on Friday after the incident.

There, police officers located a teenage boy and a man in his early 50s, each with a single stab wound. The pair was taken to hospital where they remain in a stable condition.

The boy who hosted the event, who gave his name as Sam, told The Sunday Telegraph that gatecrashers had arrived just before the alleged attacks.

When he approached one of the males and asked him to leave, Sam alleges he was struck in the head with a glass bottle by a second person he didn’t see.

That’s when his stepfather, Mick, was allegedly stabbed, along with a teenage friend who tried to intervene, Sam told the paper.

“It just escalated ridiculously. They were kicking girls. They had no respect,” he said.

Police later swooped on a car nearby and arrested three males.

A 17-year-old male has been charged with reckless wounding, affray and common assault, and was granted conditional bail to appear at a children’s court on December 10.

A 16-year-old male was charged with assault occasioning actual bodily harm and affray, and was granted conditional bail to appear at the children’s court on Thursday 8 October 2019.

A third person — an 18-year-old male — was released pending further inquiries.

Sam’s mother Lisa told The Sunday Telegraph that three security guards had been hired for the party for her son’s Grade 12 class.

“We took every precaution,” Lisa said. “It was just those kids (the gatecrashers) who ruined it for everyone.”

As inquiries continue, anyone with further information is urged to come forward to police or contact Crime Stoppers on 1800 333 000