WATCH: What you should do during a terrorist attack

Run, hide, tell... police instructions on what to do during a firearms attack.
Run, hide, tell... police instructions on what to do during a firearms attack.
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This police video gives instructions on how to stay safe during a terrorist attack involving firearms and other weapons.

It has been shared on social media by police forces across Yorkshire and the rest of the UK during the last few days.

Police and fire crews were called

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