TALLAHASSEE, Fla. (AP) — The Latest on a shooting at a Florida high school (all times local):

6:15 p.m.

The National Rifle Association has filed a federal lawsuit over gun control legislation Florida Gov. Rick Scott has signed, saying it violates the Second Amendment by raising the age to buy guns from 18 to 21.

The lawsuit came just hours after Gov. Scott, a Republican, signed the compromise bill Friday afternoon.

Lawyers for the NRA want a federal judge to block the new age restriction from taking effect.

The new legislation raises the minimum age to buy rifles from 18 to 21, extends a three-day waiting period for handgun purchases to include long guns and bans bump stocks that allow guns to mimic fully automatic fire. It also creates a so-called "guardian" program that enables teachers and other school employees to carry handguns.

The new measures come in the wake of the Feb. 14 shooting rampage at Marjory Stoneman Douglas High School in Parkland, Florida, that killed 17 people.

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4:45 p.m.

The National Rifle Association is expressing disappointment after Florida Gov. Rick Scott signed a gun control bill that was written after a mass shooting at a high school killed 17 people.

Chris W. Cox, executive director of the NRA's Institute for Legislative Action, says the bill "punishes law-abiding gun owners for the criminal acts of a deranged individual."

The bill signed Friday raises the minimum age to buy rifles from 18 to 21, extends a three-day waiting period for handgun purchases to include long guns and bans bump stocks that allow guns to mimic fully automatic fire. It also creates a so-called "guardian" program that enables teachers and other school employees to carry handguns.

The new measures come in the wake of the Feb. 14 shooting rampage at Marjory Stoneman Douglas High School in Parkland, Florida.

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3:15 p.m.

Florida Gov. Rick Scott has signed a school safety bill passed by the Legislature in response to the Valentine's Day mass shooting that killed 17 people at a high school.

The bill signed Friday falls short of what Scott and the shooting's survivors wanted. It also marks Scott's break with the National Rifle Association.

It raises the minimum age to buy rifles from 18 to 21, extends a three-day waiting period for handgun purchases to include long guns and bans bump stocks that allow guns to mimic fully automatic fire. It also creates a so-called "guardian" program that enables teachers and other school employees to carry handguns.

Student activists from the school where the shooting took place followed the bill's track closely and called it "a baby step."