At least two people were killed and dozens injured in a mass shooting in Baltimore in the early hours of Sunday, authorities said.

The two people killed were adults, but neither has been identified. Police confirmed that another 28 were injured, three of them seriously.

«Our hearts and prayers go out to the families and friends of these victims, as well as to the community throughout our city,» Acting Police Commissioner Richard Worley said at a news conference.

Police received the first calls around 12:30 a.m. Sunday.

“This was a reckless and cowardly act that happened here,” Baltimore Mayor Brandon Scott said at the same news conference.

«I want those responsible to listen to me, listen to me very clearly, we will not stop until we find them and we will find them.»

Addressing the perpetrators directly, the mayor said, «I hope that with every breath you take, you think of the lives you took and you think of the lives you impacted here tonight.»

The shooting occurred at a block party being held in the Brooklyn Homes neighborhood of Baltimore.

This is a developing story, check back here for updates soon.

The Associated Press contributed.