Meeting in the tower room was about Intel(information)….I dont think a person was extracted, but arrests were likely. What's important is as Q stated "Intel". Windows were open on side off building as a means to vent smoke and powder from Grenade explosion…Cant tell from Photo but to me the 2 open windows on the side dont seem to have residue(air intake) but of course a master of photos could find out…..window in front was where the all the magic happened and powder/smoke was exited thru that window…..IMO…Good Guys threw in several low damage Flameless Grenades which contains a high amount of white powder and smoke to disorrent. A flash Bang would not be used as Flash bangs have a track record of injuring people, starting fires and damaging [Intel]. They also make a black residue.
Time line
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Meeting takes place in Shanghia Tower
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Good Guys throw in several granades to disorrent meeting
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Bad guys quickly neutrilized
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Side windows opened…….Intel secured
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Good Guys bug out…end of story…
Video as reference on of type of granage used: 40s mark
https:// www.youtube.com/watch?v=iG16vhGU-ks