Belgium tells World Court Habre must not leave Senegal

* Belgium seeks quick ruling to stop Habre leaving Senegal

* Habre should be tried or extradited -lawyers for Belgium

* Senegal says Belgium's main goal is extradition

By Reed Stevenson

THE HAGUE, April 6 (Reuters) - Belgium told the World Court on Monday that exiled former Chadian President Hissene Habre should not leave Senegal while Belgium is seeking to force the African country to either try to him or extradite him.

Belgium, where the legal system allows it to prosecute serious foreign crimes, charged Habre in 2005 with crimes against humanity and torture.

It is seeking a provisional judgment from the International Court of Justice (ICJ) in The Hague, fearing Habre may be allowed to leave Senegal and evade prosecution by finding refuge in another country.

"This is an urgent threat," said Eric David, a lawyer representing Belgium.