It’s possible some autonomous system marked them as candidates,
> In 2014, former CIA and NSA director Michael Hayden said in a public debate, “We kill people based on metadata.”
> According to multiple reports and leaks, death-by-metadata could be triggered, without even knowing the target’s name, if too many derogatory checks appear on their profile. “Armed military aged males” exhibiting suspicious behavior in the wrong place can become targets, as can someone “seen to be giving out orders.” Such mathematics-based assassinations have come to be known as “signature strikes.”
https://www.rollingstone.com/politics/politics-features/how-...