After being deployed during large-scale protests that have swept the District for nearly two weeks, members of the D.C. National Guard have tested positive for the coronavirus.

“We can confirm that we have had COVID-19 positive tests with the DCNG,” D.C. National Guard spokeswoman Air Force Lt. Col. Brooke Davis said in an email to DCist on Tuesday. McClatchy D.C. first reported the news.

“The safety and security of our personnel is always a concern, especially in light of the COVID-19 era,” Davis said. She declined to say to say how many guardsmen had tested positive for “operational security” reasons.

The members were among 1,300 D.C. guardsmen ordered to aid local law enforcement on June 1 after protests grew violent over the weekend.

The news comes after two members of the Nebraska National Guard who assisted police in Lincoln, Nebraska, at local protests also tested positive.

Widespread demonstrations following the killing of George Floyd have drawn massive crowds in cities across the country, including an estimated tens of thousands of participants in D.C. on Saturday.

The protests also led to an increase in law enforcement personnel, including 1,500 additional guardsmen from Indiana, South Carolina, Tennessee, and Maryland who were deployed to the District.

Some guardsmen were seen wearing masks while others were not, though Davis told DCist that unit commanders were in charge of following guidance from Defense Secretary Mark Esper, ensuring that guardsmen maintained social distancing and were provided with protective equipment.

Davis said the DCNG is exercising caution when it comes to guardsmen who were present at the protests, and that each member will undergo a medical screening process to assess their risk of infection.

“All Guardsmen who are suspected to be at high risk of infection or have tested positive for COVID-19 during demobilization will not be released from Title 32 orders until risk of infection or illness has passed.” Davis said. When activated through Title 32, guardsmen leave their day jobs to complete their mission.

Davis added, “Members of the Air and Army National Guard with no, or low risk of exposure who present symptoms of infection 1-14 days after release from orders will contact their unit to initiate service Line-Of-Duty determinations with their respective units.”