investigation of people involved in this tragic business of human trafficking. they have detained an unknown number of individuals from sahara africa. this investigation is conducted in rome and milan as well. john. >> ben wedeman, potentially hundreds of people killed there. u.s. officials are condemning the isis beheading of christians. you see the captors wearing orange jump suits. national security counsel officials are calling it a mass murder. it is being called an attempted discord amongst religious communities. we have nic robertson joining us now. nic. >> reporter: john you have isis putting together a 30-minute propaganda video which tells