Transcript for Facebook and Instagram Get Tougher on Guns
until later this month. Back here at home, a big headline turning up. And the heat is on on the gun debate in America. We learned Facebook and instagram will crack down on the number of illegal guns sold online, some of them weapons bought by children. ABC justice correspondent, Pierre Thomas, showing what's behind this decision. Reporter: You're looking at the sale of an ak-47 assault rifle in an Arizona fast food parking lot. It came less than an hour after reporter Mariana van Zeller saw it for sale on the internet. No background check. No questions asked. Critics say social media sites like Facebook and instagram are becoming virtual gun stores, giving potentially easy access to juveniles and criminals. The internet dwarfs all the gun shows in America now as a potential source of firearms. It is difficult to police the internet. Reporter: Check this out. On instagram, lots of guns to choose from. All kinds of assault rifles, handguns, just a touch or click away. Today, instagram and Facebook announced a series of steps to try to make sure social media gun buyers and sellers follow the law. Facebook will block access to gun sale posts to users 18 and under. Remove gun sale postings that promote sales without background checks. It will tell users that internet gun sales crossing state lines must go through a licensed firearms dealer. The head of the NRA's new affiliate warned, the policy could be used to silent gun enthusiasts on social media. But sun control supporters say additional restrictions might save lives. Preventing dangerous scenarios, like when a 15-year-old Kentucky boy bought this semiautomatic handgun through Facebook and took it to school. Pierre Thomas, ABC news,
This transcript has been automatically generated and may not be 100% accurate.