Story Highlights:
NATO says insurgents suffer heavy casualties in daylong fighting
Suicide bomber riding a motorcycle kills at least 21 people
Coalition reports suffering casualties in heavy fighting with insurgents
Teen suicide bomber detonates explosives-laden vest killing three
More...
See also:
9 Americans Die in Afghan Attack
'Heroic' fighting repels Afghan militants
Pakistan intelligence blamed for Afghan attacks
Pakistan Rejects Afghan Accusations
Pakistan militants focus on Afghanistan
Bold Afghan Raid On U.S. Base Casts Doubts
