Las Vegas police say officers arrested a masked man at a mall, which had been evacuated after reports of a gunman inside.

This incident first broke around 7 p.m. Thursday at the Boulevard Mall.

Police say the gun appears to be fake. Police say no shots were fired and no injuries were reported. 

In October, a gunman opened fire at an outdoor country music concert killing 58 people in the deadliest mass shooting in modern US history.

Authorities do not know why Stephen Paddock fired hundreds of rounds indiscriminately from the 32nd floor of the Mandalay Bay hotel using a series of semiautomatic rifles, some outfitted with a device that allowed him to fire faster.

(CNN and The Associated Press contributed to this report.)