Here is some stories about AI bot experiments. The first three are from 2016 or 2017 but you may still find them interesting.
I like many fell for misinformation about the first one that spread by word of mouth or online.
Here is an earlier story but in this case what I heard was mostly accurate.
This one demonstrated aggressive behavior from competing bots when they had not intentionally programmed them to act this way.
More recent news about AI.