The Los Angeles County coroner’s officials say determining the cause of death of a Canadian tourist found in a Los Angeles hotel water tank will require more tests.

Coroner’s spokesman Ed Winter says an autopsy was performed Thursday on 21-year-old Elisa Lam. How she died won’t be known until the results from toxicology tests are returned.

Lam’s body was found Tuesday in a water cistern atop the downtown Cecil Hotel. Police call Lam’s death suspicious.

Guest complaints about low water pressure prompted a maintenance worker to make the gruesome discovery.

Before she died, hotel surveillance footage showed her inside an elevator pushing buttons and sticking her head out the doors, looking in both directions.