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WOODBRIDGE, Va. (WUSA9) -- A man sexually assaulted a woman, then attacked a man with a machete, police said.

Carlos Roberto Osorio, 22, of Woodbridge, was sexually assaulting a 22-year-old woman when a 33-year-old man confronted him, police said.

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"At that point, the accused struck him in the head with the flat part of a machete. Following the assault the accused fled the residence. The accused was not known to the victim and was attending a party at the residence at the time of the encounter. Officers obtained warrants against the accused who was located later in the evening," police said.

The incident happened at around 10:27 p.m. in Woodbridge, on April 5, police said.

Osorio is charged withaggravated sexual battery, malicious wounding and destruction of property, police said.