Iraqi soldiers guard suspected insurgents at the back of a police vehicle after the insurgents were captured by joint U.S.-Iraqi military forces during an operation called Arrowhead Ripper in Baquba, 65 km (40 miles) northeast of Baghdad June 25, 2007. U.S. troops hoping to directly confront al Qaeda militants in a major offensive in the Iraqi city of Baquba instead found themselves "swimming through a minefield", a senior officer said on Sunday.