Libyan opposition forces suffered heavy casualties in an assault Friday on Bani Walid, one of the last cities held by ousted leader Muammar Gaddafi’s loyalists. Gaddafi’s forces occupying the city met the rebels with sniper and rocket fire. According to the rebels, Gaddafi’s son Saif al-Islam Gaddafi is commanding the resistance in Bani Walid. By Friday night, the rebels ordered a retreat from Bani Walid in order to bomb the city, reports Reuters. The rebels’ attack on the city of Sirte, Gaddafi’s hometown, was also repulsed.