The victim was subjected to a five-hour ordeal at the home in Gillingham, Kent last weekend after her attackers were housed in the same building.

A source told The Sun: “She is deeply distressed by the ordeal. It was horrific.

“The victim thinks there were five attackers. The issue is what were they doing there in the first place?

“She is a vulnerable teenager and was under the same roof as some of these suspects.”

Four men have been arrested and have already appeared at a youth court hearing at Medway Magistrates Court. They all claim to be under 18, and thus cannot be named, but police believe them to be older than they stated.

Two other men were arrested but later released without charge.

Last weekend, a Sierra Leonean migrant was badly injured after being stabbed by a 19-year-old Somali at an asylum centre in Bavaria, Germany. The two had been arguing loudly when the Somali pulled a knife and stabbed the Sierra Leonean several times.

The victim had to be flown to a nearby hospital for emergency treatment while the Somali man sustained minor injuries.

Europe has witnessed increasing violence as record numbers of migrants pour across its borders, heading north through the Balkans and into Austria and Germany.

In another incident, an Austrian soldier was attacked with a fencepost while patrolling the border with Slovenia this week. The soldier from the 23rd Battalion of Vorarlberg suffered cuts to the face and had to receive treatment at a local hospital

The Austro-Slovenian border has become a major flashpoint in the migrant crisis, as thousands stream across in the space of a few weeks.

Tensions have been growing after Hungary, previously one of the main migrant routes in Europe, sealed its border with Serbia, thus forcing the migrants to travel into Croatia and Slovakia instead.

There remains no indication yet that their numbers will fall.