Arizona Republican Sen. Jeff Flake on Wednesday said he is working on bipartisan legislation to raise the minimum age to buy an AR-15 to 21 years old.
In a tweet, Flake said he was working with California Democratic Sen. Dianne Feinstein on the bill, which would prevent Americans under the age of 21 from buying the rifle used in the Florida school shooting, unless they are military members.
The minimum age to buy a handgun is 21 under federal law. The minimum age to buy a rifle is 18.
Law enforcement officials said Nikolas Cruz used an AR-15 to kill 17 people at Marjory Stoneman Douglas High School in Parkland, Fla.
White House Press Secretary Sarah Sanders said Tuesday that President Trump was open to raising the minimum age requirement to purchase an AR-15.
On Tuesday, Trump announced that he had directed Attorney General Jeff Sessions to direct The Bureau of Alcohol, Tobacco, Firearms and Explosives to come up with regulations to ban bump stocks, a firearms accessory that can be used to simulate automatic fire on a rifle.