The woman who was shot worked at the concierge desk as a vendor for the travel website VEGAS.com, which is owned by the Greenspun family, publishers of the Las Vegas Sun.
"We were saddened to learn that a member of the VEGAS.com family was the victim of tonight's tragic and senseless killing at the Excalibur," VEGAS.com Chief Operating Officer Bryan Allison told the newspaper. "Our thoughts and prayers are with her family and friends."
MGM Resorts International owns the Excalibur and several other hotels on the Las Vegas Strip. Company spokesman Gordon Absher said the hotel and casino remained open to guests and patrons. However, the area where the shooting took place was cordoned off by police while the investigation was under way.
The Excalibur has approximately 4,000 rooms. The hotel is named for the mythical sword of King Arthur.