U.S. and Iraqi forces have launched the second operation targeting insurgents in western Anbar province in the past two days.
About 1,000 troops began Operation Dagger Saturday in a remote lake region northwest of Baghdad.
|Debris from US airstrike targeting insurgents in Karabilah, June 12, 2005|
This the same area where U.S. and Iraqi forces killed a large number of insurgents in March.
Earlier, military officials said about 50 insurgents have been killed 100 captured near the town of Karabilah in a separate operation launched Friday.
Troops found four Iraqi hostages beaten and chained to a wall in a bunker.
Some information for this report provided by AP and Reuters.