Virginia police are investigating what appears to be an attack on Sen. Mark Warner Mark Robert WarnerDemocrats call for declassifying election threats after briefing by Trump officials It's time to upgrade benefits Intelligence chief says Congress will get some in-person election security briefings MORE’s (D-Va.) regional office in Roanoke after a brick was reportedly thrown through the office’s front window before it opened Monday morning.

"This morning prior to 8 a.m., an individual threw a brick through the front office window of Sen. Warner's Roanoke office," Warner's communications director Rachel Cohen said in a statement to CNN. "Thankfully due to the early hour no one was in the office at the time."

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Local police were reportedly called to the office after being notified of an individual carrying bricks walking around the area.

The suspect, who has yet to be identified, is a slender white man expected to be in his early to mid-20s with light-colored hair, according to CNN.

Local police are also reportedly looking through surveillance footage of the incident to identify the man.

Warner said he was grateful for the speedy response from the Roanoke Police Department, who handled the investigation.

“Early this morning, someone threw a brick through the front office window of my Roanoke office,” Warner said of the incident on Twitter. “Thankfully, due to the hour, no one was there and no one was hurt. We’re all extremely grateful for the quick, professional response of the Roanoke Police Department."

Early this morning, someone threw a brick through the front office window of my Roanoke office. Thankfully, due to the hour, no one was there and no one was hurt. We’re all extremely grateful for the quick, professional response of the Roanoke Police Department. — Mark Warner (@MarkWarner) July 23, 2018

As of Monday afternoon, police have not determined a motive behind the apparent attack.

The incident comes days after multiple shots were fired through the window of the Albany County Democratic Committee's headquarters last week.

According to the Times Union, six rounds were fired through the window of the committee’s chairman Jack Flynn, where he has been known to work late sometimes. The chairman later said he believes the attack was intended to be a “statement.”

A GOP headquarters in Nebraska was also vandalized earlier this month.

Local police reported broken windows at the Nebraska office in addition to the words "abolish ICE" written on the sidewalk in front of the building.