Montgomery County Police are investigating two robberies in Wheaton, Md. which involved online sales.

In both incidences, victims were robbed when they met to exchange goods and complete the transaction in person. Maryland Police say both robberies are unrelated.

The first robbery happened on July 6 at around 11 p.m.

Police say a man advertised a pair of shoes on the Facebook Marketplace app. When the man met up with the suspect in person, to complete the transaction, the suspect pulled out a gun and stole the shoes.

The suspect is an African-American male, 5'8 in height. Police say he fled the area in a blue Honda Accord, wearing a black t-shirt and gray sweatpants.

The second robbery was on July 8 around midnight.

Police say a female victim listed a digital camera on the app "OfferUp." She agreed to meet with the alleged buyer in person to purchase the camera. Police say during the exchange; the female victim was assaulted and her camera was stolen.

The suspect is described as a young man, between 18 and 24-years-old, Hispanic, 5'8 in height with a slim figure. He was wearing a multi-colored hoodie and khaki pants when he fled the scene.

Montgomery County Police are encouraging people selling things online to use “exchange zones.” These are locations sellers can use to meet buyers in person safely.

Anyone with information regarding these two robberies or the suspects is asked to call the 4th District Investigative Section at 240-773-5530. Those who wish to remain anonymous may call Crime Solvers of Montgomery County toll-free at 1-866-411-TIPS (8477). Crime Solvers will pay a cash reward of up to $10,000 for information provided to them that leads to an arrest in this case.