Those were definitely not fireworks. Multiple people reported hearing gunfire for a while on New Year’s Eve. Thankfully no one was hurt.

From Reddit RVA and a tip from EK

This bullet was lodged in the upstairs window frame on the back of my house after last night’s gunfire in the East End. About ten feet from my bed, and missed a much larger window a few feet away. I wasn’t home when it happened. Luckily it only broke the outer pane of glass and didn’t land in somebody’s brain.The cop I reported it to said they’d responded to at least five similar reports today..”.