Queensland Police are investigating a suspected homicide after a woman's shooting death on Brisbane's southside last night.

Police were called to a townhouse at Rochedale South around 8:30pm yesterday and found a woman in her 20s with a gunshot wound to the head.

She was taken to Princess Alexandra Hospital but died soon after.

Homicide investigators, forensic officers and police combed the Jacaranda Gardens unit complex for clues last night.

They say it is not a suicide and want to hear from anyone that heard or saw anything suspicious in the area.

A command post has been set up at Logan Central Police Station.