Although there was no shooting during the incident, the robbers were armed, the Las Vegas Metropolitan Police Department's Lt. Carlos Hank told ABC News.

The Bellagio was on lockdown after the incident for about 30 minutes.

The store was not open at the time of the incident.

The suspects wore character masks, but Lt. Hank could not confirm the specifics of the mask. One eyewitness, though -- a woman named Kira, who did not want her surname used -- told ABC News she saw a man wearing a pig mask (below).

\"PHOTO:
@Kir_kamil/Twitter
PHOTO: An eyewitness tweeted this photo of an individual outside the Rolex store at the Bellagio in Las Vegas on March 25, 2017. The eyewitness claimed the individual was carrying a gun.
>

Lt. Hank said early Saturday morning that some people were detained, but it is unclear if the detained individuals are burglary suspects.

#bellagio pic.twitter.com/dlniE3cCie

— Zuleyka Veronica (@Zuleyka_Alvarez) March 25, 2017

ABC News' Alex Stone contributed to this story.

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