SALAHUDDIN QUADER CHOWDURY AND ALI AHSAN MOHAMMED MUJAHID WERE HANGED IN DHAKA CENTRAL PRISON .. HUMAN RIGHTS WATCH HAD URGED THAT THE DEATH SENTENCES NOT BE CARRIED OUT .. FOUR PEOPLE HAVE NOW BEEN HANGED BY THE WAR CRIMES TRIBUNALS SET UP BY DHAKA WHICH HAVE NO INTERNATIONAL RECOGNITION .. CRITICS SAY THEY SIMPLY HANG OPPONENTS OF THE CURRENT GOVERNMENT OF KHALEDA ZIA ..