There were around 600 people in the park when the fireworks exploded. Witnesses told police they heard 30 rounds of gunfire right after the fireworks, according to Calzada.
Responding officers found five people with injuries and transported them all to a local hospital. Three sustained non-life-threatening injuries, and two others are in critical condition, Calzada said.
"The best thing we can do for them is obviously to pray and … get them medical treatment right now," Calzada said of the victims.
No further information was provided about the victims or possible suspects during the press conference.
The police department's gang is taking the lead, and state and federal partners are assisting with the investigation, according to Calzada.
When it comes to the large crowd, Calzada explained that while the department works to tell people to follow social distance rules, they try not to enforce quotes.
"We have stated that everyone would follow the rules set," Calzada said. "We've tried to work with everyone so as not to quote or ticket them, but in the end, people have a choice, and that's just the choice they made tonight."