An anti-transgender "graffiti attack" was levelled at the office of Labour's Taieri MP Ingrid Leary, in South Dunedin, last night.
Ms Leary found out about the graffiti, which was spray-painted across windows featuring images of the MP, this morning.
The fact that someone had resorted to criminal activity such as defacing property was a "sad reflection of their values", she said.
"If this is the abuse they level at politicians, we can only imagine what the trans community has to endure at their hands."
The anonymous actions showed cowardice, she said.