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The girl, named only as Leonie, heads up the gang of six migrants who are purported to have carried out several Sharia-inspired attacks across the European capital of Vienna.

Leonie, 15, was among the six Muslim youths from Chechnya who allegedly beat up a teenage girl, named as Patricia, in the centre of the Austrian capital city.

Patricia, a Polish schoolgirl, was falsely accused of pulling off a Muslim woman's headscarf.

The attack, which left her with a broken jaw in two places, shocked Austria when footage of the beating went viral.

However, now prosecutors believe they have enough evidence to prove this attack was in fact one of many carried out by the migrant gang.