2 people were killed and 28 wounded in mass shooting at a Baltimore block party

An 18-year-old woman and a 20-year-old man were killed and 28 others injured in a mass shooting at a Baltimore block party, officials said.

All 30 of the victims had gunshot wounds, Baltimore Police Acting Commissioner Richard Worley said in a Sunday afternoon news conference. Their ages range between 13 and 32 years old, Worley added.

Authorities believe roughly 14 of the victims hurt were under 18 years old, he said.

Nine of those injured remained in nearby hospitals "in various conditions" Sunday afternoon, the commissioner added.

Investigators continue to scour the large crime scene - which spans multiple blocks - and officials urged anyone with information or who may have captured video footage, including from security cameras, to come forward.

There were "at least two" people who opened fire during the shooting, but authorities are investigating there may have been more, Worley said. Authorities have not shared information about a potential motive.

"All we know right now is that we had multiple (shooters) open fire on a large crowd of people who were out during the block party. We don't know if they were targeted or if (the shooters) were just shooting indiscriminately down the street," Worley said.