Two car bombs kill at least four people Monday in one of the bloodiest attacks this year in Dagestan, a turbulent province in Russia's North Caucasus region.<br/> <br />Dozens were wounded in the attacks.<br/> <br />Car bombs, suicide bombings and firefights are common in Dagestan, which is at the center of an Islamist insurgency.<br/> <br />Authorities say the explosions took place within a few minutes near a government building and appears to have been detonated by remote control.<br/> <br />The main suspect in the Boston Marathon bombings, Tamerlan Tsarnaev, lived in Dagestan with his family about a decade ago and visited the region last year.<br/> <br />At least 405 people were killed in Dagestan in violence linked to the insurgency last year, according to the Caucasian Knot website, which tracks developments in the region.
