The New Nation - Internet Edition

AP, Baghdad

Anti-American Shiite militia leader Muqtada al-Sadr ordered his followers Saturday to defy government orders to surrender their weapons, as U.S. jets struck Shiite extremists near Basra to bolster a faltering Iraqi offensive against gunmen in the city.

Prime Minister Nouri al-Maliki acknowledged he may have miscalculated by failing to foresee the strong backlash that his offensive, which began Tuesday, provoked in areas of Baghdad and other cities where Shiite militias wield power.

Government television said the round-the-clock curfew imposed two days ago on the capital and due to expire Sunday would be extended indefinitely. Gunfire and explosions were heard late Saturday in Sadr City, the Baghdad stronghold of al-Sadr's Mahdi Army militia.

The U.S. Embassy tightened its security measures, ordering all staff to use armored vehicles for all travel in the Green Zone and to sleep in reinforced buildings until further notice after six days of rocket and mortar attacks that left two Americans dead.