The rape is said to have been broadcast on Facebook live
Disgusted witnesses who saw the footage said the men only stopped their horrendous attack when police stormed the flat and stopped the broadcast.
Swedish officers have arrested three men in connection with the attack, after a member of the public alerted police to the incident just before 8.30am this morning.
The rape is said to have taken place in an apartment in the city of Uppsala this morning.
preliminary investigation has begun and there is full confidentiality
Armed officers have cordoned off the area surrounding the home where the crime took place where scenes of crime officers are undertaking a technical examination.
Police are not revealing information about the matter, but confirmed three people have been arrested on suspicion of aggravated rape.
The three arrested were born in 1992, 1996 and 1998 after the horrific attack was apparently broadcast live on Facebook.
It has been reported that the rape was filmed and broadcast to 200 people
The officer in charge of the investigation Ivan Aslund said: "We cannot comment on anything at the moment.
"A preliminary investigation has begun and there is full confidentiality".
Witnesses who claim to have seen the film say they saw a live broadcast that looked very alarming.
Get Quotes on Home Insurance
The rape is alleged to have taken place in the student city of Uppsala
They described two men pushing down a girl on the bed and holding her against her will and subjecting her to a serious sexual assault.
According to local tabloid Aftonbladet, at first they thought the sinister video was a joke before realising it was real and that more than 200 people watched it live.
Another witness said the crime was broadcast on a closed Facebook group.
The crime was reported in Sweden's fourth largest city
He told Sweden's Expressen: “The first thing you think is 'How can you do such a thing to a girl? and how can you do it live when you know that you are going to go there?'
"I think of course that it is screwed, totally sick.”
According to reports one of the clips showed the final sequences of the incident and appears to show police step into the picture and interrupt transmission.