What on earth is going on?

• May 17th and 18th in Ajax, at the same house (https://www.drps.ca/news/shots-fired-at-residence-in-ajax-1/)
• May 19th in Whitby (https://www.drps.ca/news/shots-fired-at-residence-in-whitby/)
• May 20th in Oshawa (https://www.drps.ca/news/no-injuries-after-shots-were-fired-at-a-home-in-oshawa/)

Nearly all of these happening in the middle of the night, with police finding shell casings, but no victims or suspects.

"Investigators are continuing to look into if any shootings this weekend are connected."