Police are on the hunt for a masked man who sexually assaulted a teenage girl in a Melbourne home.

A teenage girl has suffered a "horrific" sexual attack in her own bedroom after a masked man invaded her Melbourne home.

Police are extremely concerned about the nature of the attack, which they say is "absolutely random" and occurred just after 7am on Friday in a Roxburgh Park home.

Detective Senior Sergeant Jason Walsh from the sexual crimes squad said the man, who was wearing a balaclava, is believed to have jumped the fence from an adjoining property, and shrugged off his jacket before breaking into the home.

He then walked through the house, went into the sleeping 16-year-old's bedroom, and kneeled beside her bed before waking her up.







The victim, who Det Sen Sgt Walsh called "incredibly brave", woke up "in absolute shock and fear" before enduring 25 minutes of sexual assault.

"The attack on the young girl is horrific and is extremely concerning to police," he told reporters on Saturday.

"A house-entry rape on a young girl who's asleep in her own bed is extremely serious and worrying."

Det Sen Sgt Walsh said the man spent about 30 minutes inside the home, 25 of which were with the victim.

He said there was "quite a bit of conversation between the two" during the attack, but would only say the girl was told to "be quiet".

After the attack, the intruder forced the girl into the bathroom while he escaped though the bedroom window.

She alerted her parents immediately and they called the police.

Nothing was stolen from the house.

The completely random nature of the attack has police deeply concerned, as they don't know if the intruder had "followed and stalked" his victim prior to the rape.

"We don't know how he's come to know the young girl's come to be asleep by the bed - we don't know if this young girl's been followed and stalked," he said.

Police have released CCTV footage obtained from a nearby property clearly showing the man putting on his jacket and running away south along Roycroft Road, Roxburgh Park, with a distinctive gait.

Det Sen Sgt Walsh is hopeful someone knows the man, as the victim was able to provide a "reasonably good description" of his features based on the times he took off his balaclava during the attack.

Police believe the man was "clearly attending that house with a purpose", Det Sen Sgt Walsh said.

The victim was being looked after by her family and was "very traumatised".

The intruder is described as in his early-to-mid 20s, Caucasian, about 177cm tall with a thin and muscular build and an Australian accent.