Victoria’s top cop has condemned a poster allegedly distributed by Occupy Melbourne protesters that singles out a police officer and labels him ‘‘violent and dangerous’’.

The face of the officer, who was photographed while on duty at Friday’s chaotic showdown with protesters in City Square, is clearly visible in the poster under the words: ‘‘Community notice. This officer is violent and dangerous’’.

Police say the poster is defamatory. Credit:3AW

Acting Chief Commissioner Ken Lay and other senior members of the force wrote to all members of Victoria Police last night condemning the ‘‘defamatory’’ poster, which they said would not be tolerated.

Police will seek legal advice to determine whether action can be taken against those who made and distributed the poster.