An insurgent group warned in a videotaped message it would launch a campaign of attacks on government offices in Baghdad, telling employees to stay away. Al-Sadr’s militants also kidnapped a top Baghdad police official and demanded that their comrades in detention be freed.

In the city of Nasiriyah, 190 miles south of Baghdad, militants raided the local office of interim Prime Minister Ayad Allawi’s Iraqi National Accord party, set it on fire and warned party members to leave the city, an assault captured on video obtained by Associated Press Television News. More…