UPDATE: The search is on for a man police say shot another outside a gas station on Lee Highway Wednesday morning. 

Police are checking surveillance cameras in the area hoping to get a better description of the person they say shot someone in the parking lot. 

Their investigation centered around a truck where they believe everything unfolded. 

"His friend had gone inside to purchase something inside the store and while he was inside the store the robbery took place," Chattanooga Police Detective Christopher Blackwell said. 

Blackwell said a man walked up to Jonathan Smith, 39, who was inside the vehicle, demanded money and showed a gun before shooting the person in the leg. 

Blackwell said the person is expected to be okay but police don't have a lot to go off to catch the person responsible. 

"The lack of a description, a full description, and lack of witnesses of the incident," he added. 

While police focus on finding more clues, there are three things you can do to stay safe and help keep this kind of scenario from happening to you. 

"Regardless of how quick you think you're going to be in the store always lock your doors. Notice your surroundings park in well-lit areas," Blackwell said. 

And if someone ever does try to rob you, Blackwell said the best thing you can do is comply and call 9-1-1 immediately. 

The shooting happened at a very busy time during the morning commute, police are hoping someone may have seen something. 

If you can help their investigation, give police a call at 423-698-2525. 

PREVIOUS STORY: Chattanooga police are investigating a shooting at a Lee Highway gas station Wednesday morning.

Police tell Channel 3 that the victim was grazed by a shot in the Mapco Convenience Store parking lot.

Police are still at the scene, gathering evidence.

Stay with Channel 3 and WRCBtv.com for more on this developing story.