Health officials have issued a do-not-drink order at a downtown Los Angeles hotel where a missing Canadian woman's body was found in the rooftop water supply.

The disclosure contradicts a previous police statement that the water had been deemed safe.

Allen Solomon, a spokesman for the Los Angeles County Department of Public Health, said Wednesday that the agency's laboratory is analyzing the water from the rooftop cistern.

Results are expected Thursday morning.

A maintenance worker at the historic Cecil Hotel found the remains of 21-year-old Elisa Lam on Tuesday morning after guests complained about low water pressure.

Police are working to determine if her death was the result of foul play or an accident.