A Friday night at the movies ended abruptly when urine samples labeled "highly contagious" were delivered to the wrong address.

A package marked "highly contagious human substance" arrived at the North Bend Theater in North Bend, Washington, according to Eastside Professional Firefighters, who responded.

Authorities evacuated the theatre and closed nearby streets, CNN affiliate KOMO reported. The manager was also taken to the hospital as a precaution.

About an hour after the theatre was cleared out, the substance was determined to be urine samples and was disposed.

"All is well," the theater wrote on its website. "There was no danger. We will be open as usual" on Saturday to show "Frozen II."

Turns out the package was meant for a medical clinic in Tacoma about 75 kilometres away, Sgt. Paul Graham with Snoqualmie Police told KOMO. How it ended up at the theater is unclear.