Rule 9.3.3

[tw1ns]

My apologies for not doing the legwork and searching for this...I am sure it is answered in here somewhere.
Team A is shooting 2 free throws, I am administering them while one of my partners is closest to the benches. 2 of Team A's players leave the court to -get a drink of water, and to clean off shoes on the sticky mat? He tells me this after the half ends. I am thinking it is a violation for leaving the court, and that the first free throw should have been waved off? Am i correct on this? Thanks