Tamil rebels and government troops wage fierce battle along frontline . NEW : Senior army sources say 400 soldiers killed ; 100 injured . Some of the injured were flown to Colombo hospitals . NEW : the Kilaly Lagoon rebels feigned retreat then attacked , sources told Tamil Tigers . Government leaders have vowed to `` eliminate '' rebels by the end of the year .
Tamil rebels and government troops wage fierce battle along frontline . NEW : Senior army sources say 400 soldiers killed ; 100 injured . NEW : the Kilaly Lagoon rebels feigned retreat then attacked , sources told Tamil Tigers . Government leaders have vowed to `` eliminate '' rebels by the end of the year .