An American nanny whose half-naked body was found in her Vienna apartment died of "suffocation," police in Austria said Thursday.
Lauren Mann, 25, was found at her home in the city Tuesday night. A large amount of blood was found at the scene.
Police are still treating the case as homicide "because third party involvement cannot be excluded," a spokesman told NBC News. Police have been speaking to Mann's neighbors and friends, but he said "no specific suspect" was being investigated.
American authorities are assisting in the investigation, according to the U.S. State Department, and a police spokesman told NBC News that toxicology testing has been ordered.