A roadside blast struck a NATO convoy in southern Afghanistan and wounded four alliance soldiers Saturday, while fighting in three separate regions of the country left more than 100 militants dead, AP QUOTED officials as saying. The NATO convoy was attacked west of Kandahar city, and the four wounded soldiers were evacuated to a nearby military hospital, said Maj. John Thomas, a NATO spokesman. Qari Yousef Ahmadi, a purported Taliban spokesman, said a suicide bomber had attacked the convoy. An Associated Press reporter at the site of the blast said the wounded soldiers were Canadian, but their nationalities could not immediately be officially confirmed.