Police in Iraq's Anbar Province have imposed an evening curfew and have given protesters an ultimatum - find the killers of four soldiers in the next 24 hours or there will be consequences. <br />Weeks of anti-government protests has boiled over into violence and anger in the past five days. <br />More than 200 people have died in the fighting.<br />Al Jazeera's Omar al Salah reports from Baghdad.
