It is being studied by the Chief Prosecutor of the Tribunal, Carla Del Ponte. Part of the apparent limitations is that States, institutions and organizations cannot be charged, only individuals can. They seek indictments for violation of international laws.
Justice needs to be done.
Clearly, all parties to violence directed to unarmed civilians should be at risk given the International Criminal Tribunal's mandate. What NATO has propagated is terrorism directed toward, in many cases, innocent civilians in its attempt to bring Yugoslavia to its knees, rather than seeking a non-imposed resolution to the problem as mandated by the United Nations Charter. Discussions in Paris were only superficially carried out, with the US wielding the big stick rather than encouraging the various parties to negotiation. Negotiations are necessarily difficult in complex situations, but nevertheless they ultimately can lead to a peaceful, and lasting co-existance. We have already seen historically the results of these types of impositions in the development of new, more extensive wars that develop after one party feels it has not been adequately heard.