Political activist Paddy Gibson allegedly threatened by three men who tried to break into his Sydney home

Campaigner called outside by trio on Saturday night before window smashed with Greens MP warning of troubling escalation of political violence'

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A prominent political activist has allegedly been threatened in his Sydney home by three men who appeared to try to force their way inside before fleeing when police were called.

Paddy Gibson, an activist with the Solidarity socialist movement and a researcher at University of Technology Sydney, said he was at home with his partner when he heard loud banging on his door about 7.30pm on Saturday night.