BAGHDAD — Unauthorized vehicles will be banned in Baghdad from 5 a.m. to midnight on Wednesday, the fifth anniversary of the city's capture by U.S. troops.

The decision by the Iraqi military command for Baghdad was announced on Iraqi state TV.

Shiite cleric Muqtada al-Sadr is threatening to lift a seven-month freeze on his Mahdi Army militia if the Iraqi government does not halt attacks on his followers or set a timetable for a U.S. withdrawal.