Two separate nightclub incidents allegedly left unsuspecting victims unconscious on Sunday.

The first of the two Canberra club attacks, on the streets surrounding City Hill, took place on London Ct about 1.50am.

The victim was allegedly punched several times in the head until he was rendered unconscious.

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“The punches were allegedly thrown quickly and without notice,” ACT Police said.

A 20-year-old Victorian man was arrested over the incident, and charged with affray.

He will face the ACT Magistrates Court on Tuesday.

Just over two hours later, another violent outbreak allegedly occurred two streets away.

A 38-year-old man from Ngunnawal was “accidentally bumped” in another city nightclub on Bunda St about 4.10am, police said.

They report that is what prompted the 38-year-old man to allegedly push the other man, and grab him by the throat until he was choked unconscious.

The Ngunnawal man faced the ACT Magistrates Court on Monday.

The ACT Police has warned there is zero-tolerance for this type of violence.

“Assaults such as these are incredibly dangerous and can cause significant injury or death,” ACT Police said.

“Police will not tolerate this type of offence in our community and will act on the incidents to the full extent of the law.”