Updated

Police in Virginia have identified a suspect in the double murder of a husband and wife – both military veterans – who were shot outside their home in Springfield on Wednesday morning.

Ronnie Keandre Marshall, 20, is wanted in connection to the brutal murders, the Fairfax County Police Department tweeted Thursday amid the ongoing manhunt. Police said Marshall is considered armed and dangerous.

The couple was shot in cold blood in their front yard just before 9:30 a.m. Wednesday, Fairfax County police said.

"They did nothing wrong. They were tragically and horribly murdered in their neighborhood," Fairfax County police Maj. Ed O’Carroll said at an evening news conference.

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O’Carroll identified the victims as Edward McDaniel Jr., 55, and Brenda McDaniel, 63. Both were military physicians, he said. 

Edward McDaniel was an active Army colonel, FOX 5 of Washington D.C. reported

Police had yet to identify the suspect -- or suspects -- who they believe killed the couple. Investigators were searching for a 2018 light-colored Nissan Altima with Maryland plate number 1EF1479. 

Investigators gather at the scene of Wednesday's double murder in Springfield, Virginia. (Fairfax County Police)

"We still need to identify this killer, we need to get him off the streets," Fairfax County police Chief Kevin Davis said. "We think he's likely still local. … The car may be parked in your neighborhood right now."

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While O’Carroll said police had yet to identify a motive for Wednesday's shooting, Davis had told reporters at the scene earlier that morning that police responded to the residence two days earlier for a potential burglary in progress. Both officials said investigators believe that the killings were related to the earlier incident.

"There's a lot of questions that we still have," O’Carroll added. "The key is the car, but ultimately the key is the shooter or a second person."

Fairfax County Police Chief Kevin Davis speaks during a news conference Wednesday following a deadly shooting in Springfield, Virginia (Fairfax County Police)

A $10,000 reward was being offered for information in the case that leads to an arrest. Earlier in the day, Davis said authorities believed the "shooter or shooters" were known to a relative of the two victims. 

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At least one other family member was inside the home at the time of the shooting, which police said was directly related to an incident at the home earlier this week, according to FOX 5. 

The killings marked the ninth and tenth homicides in Fairfax County this year. 

"It's nine and 10 too many, O'Carroll said. 

Springfield is located about 14 miles southwest of Washington, D.C.

Fox News' Stephen Sorace contributed to this report.