Great photo - that prompted me to look at sat image - lots of stuff there, including an on-base auto dealership!
https://militaryautosource.com/location/MAS-Camp-Al-Asad
Hilarious last review (~5:20 am CST) of the dealership, on Google...
The camp is near the Euphrates River, some population along river, plenty of people at risk if typically errant old Soviet / Russian / Ukrainian rockets were used, even for an intended “near miss” as some here have speculated.
Regarding type(s) of missiles used, it's been reported, that Fateh-110 short-range ballistic missiles were used (at least, in part).
A very interesting story from a year ago discusses General Qassam Suleimani, Israel, older Scuds and the Fateh-110 (both surface to surface and anti-ship versions) with an alleged accuracy of 100 to 250 meters.