GETTY • FILE PIC A girl, not pictured, was attacked at a refugee camp in Serbia

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The girl, aged 14, only escaped when a heroic passerby bravely fought off the men. Police rushed to arrest the men, and they are currently in custody. They are thought to be residents of the migrant camp in Szabadka, a Serbian city close to the Hungarian-Serbian border.

GETTY • FILE PIC The men, not pictured, are thought to live near the Hungarian-Serbian border

This was the first sexual assault in Serbia, but there have been several other sexual attacks in Europe carried out by migrants. On Tuesday a migrant allegedly raped an eight-year-old girl in Berlin. The girl’s father tried to stab the rapist, and was then shot dead by police.

Cologne: Sex Attacks and Robberies Tue, January 12, 2016 Thirty-one suspects, including 18 asylum seekers, are under investigation over offences including sexual assault and theft in Cologne on New Year's Eve. Far right protestors in Lepzig have rallied against refugees and German chancellor Angela Merkel. Play slideshow Reuters•Getty 1 of 22 Protestors in Lepzig rally after over 100 women were sexually assualted on New Year's Eve