NEW : Some opposition fighters retreated amid tough resistance . The rebels have been fighting for more than a year to oust Gadhafi and his regime. The deadline expired yesterday when they fired at our forces '' Gadhafi loyalists clash with fighters in Bani Walid , a military commander says . Fighting also is reported outside the Gadhafi stronghold of Sirte , a commander says .
NEW : Some opposition fighters retreated amid tough resistance . Negotiator : `` The deadline expired yesterday when they fired at our forces '' Gadhafi loyalists clash with fighters in Bani Walid , a military commander says . Fighting also is reported outside the Gadhafi stronghold of Sirte , a commander says .