Pressure is mounting on the FBI over the agency’s failure to act on a tip that Florida school shooting suspect Nikolas Cruz might carry out an attack.
Florida Governor Rick Scott said the agency’s director must resign, while Attorney General Jeff Sessions ordered a review, lamenting FBI “failures”.
Some of those close to the 17 victims of Wednesday’s shooting also voiced dismay at the FBI’s actions.
President Donald Trump on Friday met survivors of the attack in Parkland.
Mr Trump and First Lady Melania Trump visited a hospital and later the local sheriff’s office, thanking them for their response to the tragedy.
“What a great job you’ve done,” Mr Trump told law enforcement officials, adding: “I hope you get credit for it because believe me, you deserve it.”
Nikolas Cruz, 19, has confessed to carrying out Wednesday’s attack at Marjory Stoneman Douglas High School in Parkland and has been charged with 17 counts of murder.
It was the deadliest US school shooting since 2012 and has re-ignited debates about gun control, with many students from the school weighing in.