Two men questioned for three days in connection with the Omagh bomb were released last night without charge, gardai said. The two, both in their 20s, had been held at Monaghan Garda station since their arrest on Tuesday morning in Co Louth. A third man, also arrested at the same time, was released without charge last night. A fourth man, in his 20s, arrested in Co Monaghan at 7.30 a.m. yesterday is still being questioned.