More than one hundred people have shown up at Auckland's Aotea Square today to protest the alleged assault of a transgender woman in prison.

The activist group No Pride in Prisons questions why the woman was sent back to a men's facility.

They're calling on Serco and the Department of Corrections to release public statements about the incident.

Event Organiser Emilie Rakete said she's over contacting a ministry which doesn't return her calls.

She said the ministry's not sensitive to transgender woman and she's had enough.

"We've got a fat load of nothing from corrections over the past year." 

Members also want changes to the Corrections Department's policy on the initial placement of transgender people in prisons.