Detectives with the Shiloh Police are investigating the armed robbery of Midwest Petroleum late Wednesday night.

According to police, two males wearing ski masks entered Midwest Petroleum at 1551 Hartman Lane around 10:45 p.m. One of the men was armed with a knife and he demanded the clerk open the register. The clerk complied and the robbers took more than $100 from the store's register before fleeing east, according to Shiloh Police Chief Jim Stover. The Fairview Heights Police dog assisted Shiloh Police in tracking the suspects but lost the trail about a block east of where the armed robbery took place.

"We think that's where they might have had a car parked to get away," Stover said. "The K-9 lost the trail completely at that point."

One of the men was wearing khaki pants, a white shirt and a blue baseball cap. He wielded the knife.

The second man was carrying a gray and black backpack and wore blue pants with a dark jacket.

No one was injured during the robbery.

The police department is offering a $300 reward for information about the armed robbery that leads to the arrests of the suspects.

Anyone with any information pertaining to the robbery can call Detective Kyle Bade at 632-9047.