NEW : A fresh attack on rebel-held Libya has killed three , rebels say . NATO says it is doing all it can to avoid hurting civilians . U.N. chief Gadhafi says Gadhafi 's `` reign of terror '' is ending soon . Thousands of government troops attacked around 6 a.m. Rasmussen vows not to surrender amid heavy bombing .
NEW : A fresh attack on rebel-held Libya has killed three , rebels say . NATO says it is doing all it can to avoid hurting civilians . U.N. chief Gadhafi says Gadhafi 's `` reign of terror '' is ending soon . Rasmussen vows not to surrender amid heavy bombing .