Woman found dead in Adelaide hotel room

A woman has been found dead in a hotel room in Adelaide, with police treating the death as murder.

Staff at the Grand Chancellor Hotel in the city centre found the woman's body on Thursday morning after going to the room to investigate water running into the hallway and the room below.

"There were obvious signs of violence which made it quite obvious there was a murder," Detective Inspector Greg Hutchins said.

Police have taken away two cars they say belong to "associates" of the woman.

The woman from Sydney had been in Adelaide for three or four days.

Det Insp Hutchins said while police have yet to establish why she was in Adelaide, they are investigating the possibility she was a sex worker.