A serial flasher and public masturbator is targeting young women in the St Lucia and Toowong areas, police have warned.

Queensland Police today released pictures of a man officers are seeking regarding a string of incidents that have taken place in the western suburbs over several months.

Images of a man police believe is linked to a series of indecent incidents in Brisbane's western suburbs.

Police said they believed the man was selecting ground floor town-houses or flats, often occupied by women aged in their 20s to 30s.

"In the majority of incidents he engages in indecent activity in front of glass doors or windows," a police statement said.