Like I said, not sure how much stock you have in the Daily Trust.

A police officer attached to the U.S. embassy said they received the report of the sounds like gunshots at about 2pm.

“We went round the area (diplomatic zone) to find out what happened together with some SSS officials. We searched the bush nearby and found fireworks casing which we examined and found it was used not long ago. We questioned three people around the area and later released them when we found that they were not behind the fireworks,” he said.
As far as kids with pyrotechnics go, we face that challenge each and every day regardless of the season, climate, holiday, etc.

An abandoned lot, regardless of the neighbors seems pretty tempting even at my age