A Saskatoon teen who crashed a party early Sunday morning – at one point allegedly confining guests at knifepoint – will be in court today.

Police say it all started when the 17-year-old showed up uninvited at a yard party on the 800 block of 7th Avenue North shortly after 4 a.m. CST on Sunday.

The teen allegedly pulled a knife when people at the party asked him to leave, and that's when it turned violent. Police say the 17-year-old demanded personal property from guests and then began randomly slashing the partiers, cutting one man on the arm.

Police allege he then chased a 21-year-old man down the alley and robbed him. He's accused of then returning to the party to attack and rob a second man before confining the remaining guests in the house and demanding personal items.

Two men at the party were able to overpower him as officers arrived.

Two men were injured during the melee, but not seriously.

The 17-year-old is charged with robbery, assault, threats, break and enter and unlawful confinement.