An an armed suspect shot an armored car guard during a robbery in the Oxon Hill area of Prince George’s County, authorities said. (Matt Zapotosky)

An armored car guard was shot during a robbery in the Oxon Hill area of Prince George’s County Tuesday afternoon, authorities said.

The incident occurred about 1 p.m. outside a Save a Lot grocery store in a busy Livingston Road strip mall. Lt. William Alexander, a Prince George’s County Police spokesman, said the guard was in the process of taking money from the truck to the store when a silver, four-door passenger car pulled up and three or four males wearing masks got out.

The males, at least some wielding handguns, confronted the guard, Alexander said, eventually shooting him and driving away with some cash or other property.

Alexander said the guard was taken to a nearby hospital in serious condition. A police spokeswoman said he was shot in the hand and the bullet also apparently struck his jaw.

Another guard who was driving the truck was not hurt, Alexander said.

Investigators are still probing what precisely was taken, and they are still searching for the suspects, Alexander said.

Angelo Shorter, who works at the Beauty 4U cosmetic supply store near the grocery, said he heard a loud gunshot, then saw a Loomis armored car speeding alongside what looked like a newer silver Nissan Altima or Maxima. He said two people seemed to be inside the car.

“I just told everybody to get down,” said Shorter, 44.

Shorter said store surveillance cameras caught some of the chase. Police said they were reviewing footage from the area, and detectives were combing through the shopping center Tuesday, interviewing witnesses.

The broad daylight robbery and shooting rattled those who work and shop in the strip mall. Francis Ezediunor, a security guard at the Save a Lot who was just arriving for his shift, said the incident underscores the need for county police to supplement the work of private security guards in the shopping center.

“This is a horrible situation,” he said. “A lot is going on in this area.”

This item has been updated.