Garland police are investigating a shooting between two security guards and a customer outside of a club Sunday morning.

At about 12:45 a.m., officers were called to 7 Siete Cafe located on the 4600 block of W. Walnut Street for a disturbance.

When they arrived, they learned that two of the security guards that were working that night had escorted a customer out of the club for an unknown reason.

Later, that same customer returned with a gun and opened fire on the security guards. Both security guards returned fire, according to police, and one of them struck the customer.

He was transported to a local hospital in critical but stable condition.

Police did not say whether or not charges will be filed at this time and this investigation is ongoing.