Exclusive: Facebook to prohibit private firearm transactions on its service

By Dustin Volz WASHINGTON (Reuters) - Facebook Inc will begin prohibiting users from coordinating private sales of firearms on the online social network, a spokeswoman told Reuters on Friday. It updates Facebook's regulated goods policy, introduced in March 2014, that banned people from selling marijuana, pharmaceuticals and illegal drugs. Facebook already prohibited private firearms sellers from advertising "no background check required," or offering transactions across state lines without a li