3:26 AM: We’re receiving multiple texts from Highland Park and Westwood from people who say they heard gunshots or fireworks a short time ago. One says they called 911 and were told multiple reports had been called in. No indication so far of anyone having been injured, nor word of any proof it was gunshots – let us know if you see police in your neighborhood. (Might be a coincidence, but we should also note that the solstice officially happened at 3:12 am. The scanner indicates similar sounds being heard in other parts of the city, and one in the north end already has been determined by police to have been fireworks.)
3:41 AM: Commenters are indicating it was apparently fireworks.