The French striker appeared to lash out at the Sporting KC attacker late in Wednesday's 2-0 home loss.
With the Red Bulls trailing 2-0 in the 92nd minute, Henry ran past Kamara on a corner kick and appeared to bump heads with the striker. Both players collapsed to the pitch, with Kamara seeming to get the worst of it.
Following the match, Kamara took to Twitter, saying: "WHAT DO YOU DO WHEN ONE OF YOUR IDOLS DO YOU WRONG / DISAPPOINTS YOU?"
Henry will miss Saturday's match against the New England Revolution, a game he might have missed anyway due to the fake grass surface at New England's Gillette Stadium. The Frenchman has 13 goals and nine assists this season, which both rank among the top 10 in MLS.
Follow GOAL.COM on