May 11 (Reuters) - Gran Tierra Energy Inc GTE.TO :
* GRAN TIERRA - RISK OF NON-COMPLIANCE WITH COVENANTS CREATES MATERIAL UNCERTAINTY THAT CASTS SUBSTANTIAL DOUBT ON ABILITY TO CONTINUE AS GOING CONCERN Further company coverage: GTE.TO
May 11 (Reuters) - Gran Tierra Energy Inc GTE.TO :
* GRAN TIERRA - RISK OF NON-COMPLIANCE WITH COVENANTS CREATES MATERIAL UNCERTAINTY THAT CASTS SUBSTANTIAL DOUBT ON ABILITY TO CONTINUE AS GOING CONCERN Further company coverage: GTE.TO