Denver, Colorado (CNN) -- Operation Shepard, a four-day sweep for fugitive sex offenders in Colorado, has led to 106 arrests, according to the US Marshals Service.

Charges against those arrested ranged from failure to register as a sex offender to sex assaults against children, incest and child prostitution. U.S. marshals, who teamed up with other state, local and federal law enforcement agencies, led the operation. Ten-person teams hit the streets.

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Sex offender roundup nets 106 fugitives -