UPDATE: The substance at Luxor was deemed to be non-hazardous. Normal hotel operations to resume.

Update from Metro saying the substance was nothing hazardous @KTNV floors opening up slowly pic.twitter.com/fFaCyON3mg — Lesley Marin (@lesleymarin) February 10, 2016

ORIGINAL STORY:

Firefighters responded to the Luxor hotel-casino for a potential hazardous materials incident Wednesday.

Clark County Fire Department and Las Vegas Fire & Rescue were called to respond around 11:50 a.m. Officials are working with local law enforcement to determine the nature of the incident.

View from above of the large amount of fire trucks at the Luxor pic.twitter.com/x1DluWSYc1 — Chopper13 (@KTNVChopper13) February 10, 2016

Floors 27, 28 and 29 have been evacuated.

No injuries have been reported.

A guest room attendant found the substance in an unoccupied room and notified hotel officials. Police said there were several suspicious items.

Police said housekeeping saw "several items" they found suspicious. — Stephanie Zepelin (@StephanieKTNV) February 10, 2016

Hazmat situation on the strip. Housekeeper at the Luxor found a substance in an unoccupied room. pic.twitter.com/4TNoQztHwM — Stephanie Zepelin (@StephanieKTNV) February 10, 2016

As a precaution they called hazmat (still on scene) and evacuated three floors (54 guests). — Stephanie Zepelin (@StephanieKTNV) February 10, 2016

There are no injuries. They have not talked to the last person who stayed in that room. — Stephanie Zepelin (@StephanieKTNV) February 10, 2016

About 54 guests in the iconic 30-story pyramid tower were asked to evacuate. The Luxor has about 4,400 rooms in multiple towers.

This is a developing story. Check back to Action News for updates.