Pictured: The Officers Shot Dead in Dallas

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Two of the officers shot dead by snipers in downtown Dallas Thursday night have been identified.

Five officers were killed and seven others were injured when gunmen opened fire in the Texas city on Thursday night, according to the mayor’s office. The injured officers remain hospitalized. Two civilians were also wounded.

Read: Police Shooting Victim Philando Castile Was 'a Very Good Person ... Just Black in the Wrong Place'

Officer Brent Thompson, 43, was among the victims. He was the first ever Dallas Rapid Area Transport officer to be killed in the line of duty since the department was established in 1989.

DART Chief James Spiller told the Today show Friday that Thompson, who joined the agency in 2009, had married another DART officer just last month.

"Our hearts are broken," DART said in a statement. 

Before joining DART, Thompson worked with American police officers in Iraq and Afghanistan for the military contractor Dyncorp, according to his LinkedIn page.

Another officer, Patrick Zamarripa, was identified by his family on Twitter. His stepbrother, Dylan Martinez, shared a photo of Patrick with his father.

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"No father should have to bury his son. You are a hero, Patrick. Love you man," he wrote. Zamarripa was a family man and a military veteran, he said.

The other victims are believed to be Dallas police officers, but have not yet been identified

The shootings unfolded when anti-police brutality marches were underway following the deaths of Alton Sterling in Louisiana and Philando Castile in Minnesota. Both men were shot by police officers in incidents that are now under investigation.

Following the shootings in Dallas, three people are in custody, police said.

Watch: Mother of Philando Castile is 'Outraged' Over Son's Death By Police Officer

 

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