Two men allegedly threatened a 40-year-old gas station clerk with a knife during an armed robbery at Freedom Value Center in Austin early Tuesday.

Police Chief Brian Krueger said the gas station, located at 101 Fourth St. NW, was hit at about 1:30 a.m. The clerk told police she saw someone enter the store, but she didn’t know she was being robbed until one of the robbers grabbed her from behind and threatened to cut her with a knife if she moved.

Another robber forced the clerk to put money inside a bag before the two left.

Detectives are reviewing store surveillance footage and witnesses told police a red Pontiac was driving around the block at the time of the robbery before it went north on Fifth Street Northwest at high speeds.

It’s unclear how much money was taken.

The robbers are described as black males wearing dark clothing. One male with a heavier build wore a gray hooded sweatshirt with a do-rag and glasses covering his face, while the other, skinnier male wore black clothing. Both men were described as 6 feet tall or taller.

Krueger urged anyone with information to call law enforcement at 437-9400 or anonymously leave a tip through the Tip411 online app, under austinpd.