Students at the Florida high school where 17 people were shot dead last month are being asked to wear clear backpacks.

School officials have written to families of Marjory Stoneman Douglas High pupils outlining the plans as part of new security measures.

They said any student without a clear rucksack would be given one at no cost.

But some pupils say it does nothing to tackle the issue of gun control.

As well as introducing the backpacks, there will also be airport-style metal detectors and school visitors will be funneled through special gates.

"We're going to be able to man every gate at the school during school hours and for after-school activities," said the superintendent of Broward County Public Schools, Robert W. Runcie.

"We will be implementing a program for clear backpacks after spring break.

Since the shooting when Nikolas Cruz opened fire killing 17 people, students there have been leading calls for gun reform.

Donald Trump has told US politicians he wants tougher laws with "really strong background checks", while he's faced anger from anti-gun protesters for suggesting training school staff to use firearms.

Schools with multiple entry points would have single points of entry by the first quarter of 2019.

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