Insurgents trying to derail Iraq's January elections have attacked a voter registration center in Dujail, north of Baghdad, killing at least one civilian and wounding several others.

Another attack Saturday in Mosul killed one person and wounded at least six others when a bomb exploded near a U.S. military patrol, but instead hit a passing school bus.

Meanwhile, an Iraqi militant group claimed responsibility for the murders of two American contractors in an ambush December eighth near Baghdad.  Joseph Wemple and Dale Stoffel worked on construction and engineering projects in Iraq. 

And Turkey's foreign ministry has clarified that five Turkish security guards and two Iraqi drivers were killed in an ambush Friday near Mosul.  An earlier ministry statement did not specify how many were killed, but some news reports had said four guards were killed.

Some information for this report provided by AFP, AP, Reuters.