Protesters continued to press toward the capital of Tripoli on Thursday, while Libyan strongman Muammar Gaddafi struck back violently against their gains. In the town of Zawiya, 30 miles west of Tripoli, Gaddafi’s forces attacked a mosque where protesters had been staging a sit-in. Earlier in the day, witnesses said an envoy from Gaddafi came to the town and told them, "Either leave or you will see a massacre." An eyewitness said 100 protesters had been killed and another 400 injured, though other news agencies had lower estimates. Despite the attack, thousands gathered in Zawiya’s main square to call for Gaddafi’s resignation, though he maintains the protests are encouraged by Osama bin Laden and drug-spiked coffee. Meanwhile, Switzerland has frozen the assets belonging to Gaddafi and his entourage.