[Highland Park] Sound of shots last night around midnight?

Hello, Everyone. My husband and I heard what sounded like shots around midnight. It sounded like 15 to 20 shots, but we did not hear anything else. We live right at the junction of Highland Park, Morningside and East Liberty and were both on the edge of sleep, but talked about it this morning, wondering if it was a dream. Does anyone have any information about the loud noises last night? Many thanks, Heather and Michael