Man robs GNC health store in South Loop, police say

CHICAGO (WLS) -- Police are looking for the person who robbed a GNC health store in Chicago's South Loop on Saturday.

The robbery occurred in the 200 block of S. State Street at about 3:30 p.m., according to police.

A man went into the health store and demanded property from a witness, police said. The offender then escorted the witness into a back room, according to police.

The witness said the thief implied he had a weapon.

The thief then stole items from the store.

No one was hurt.

Area Central Detectives are investigating.