A gunman opened fire during an armed robbery at Las Vegas' iconic Bellagio hotel, prompting terrified tourists to seek shelter amid a chaotic scene.

At least three people entered a high-end store inside the resort early Saturday morning, including one who fired gunshots, police said.

Witnesses and photos suggest the armed burglary took place at the Bellagio's Rolex store, and show a person in a pig mask with a gun in hand.

One suspect has been taken into custody.

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A gunman opened fire during an armed robbery at Las Vegas' iconic Bellagio hotel early Saturday, prompting terrified tourists to flee onto the strip (pictured)

Witnesses and photos suggest the armed burglary took place at the Bellagio's Rolex store, and show a person in a pig mask with a gun in hand (pictured)

Guests and tourists had to flee the hotel and head out to the strip amid report of the armed robbery.

Panicked people have tweeted their shock, with one woman saying she had to hide under a table.

No one was injured, Las Vegas Metropolitan Police Department later confirmed. Parts of the casino property remain closed as authorities investigate.

Officers received a call about the incident at the Bellagio at 12:50 am, and has apprehended one suspect by 2:15 am, the Las Vegas Review-Journal reported.

One woman who was at the hotel when the robbery unfolded described the atmosphere as one of 'mass panic'.

'Everyone running. I'm currently ducked on the floor under a table,' she wrote.

The store was closed when the armed robbers got in and all shots were fired inside, police said.

Some witnesses said the burglars used sledgehammers to break into the store, although police have not confirmed it so far.

Officers received a call about the incident at the Bellagio (pictured during the incident) at 12:50 am, and has apprehended one suspect by 2:15 am

Authorities used crime scene tape to keep the public out of an area inside the resort as they carried on investigating the armed robbery

Guests and tourists had to flee the hotel and head out to the strip amid report of the armed robbery. Pictured is the chaotic scene outside the Las Vegas hotel

One woman who was at the hotel when the robbery unfolded described the atmosphere as one of 'mass panic'

Panicked guests had to flee the famous hotel and were confused about what was going on. Some reports suggested the robbers used sledgehammers to get into the store

No one was injured, Las Vegas Metropolitan Police Department later confirmed. Parts of the casino property remain closed as authorities investigate