In a matter of minutes, thousands of students at Marjory Stoneman Douglas High School went from thinking they were part of a fire drill to hiding inside closets and bathrooms to escape gunfire.
Authorities say Nikolas Cruz allegedly opened fire inside the Florida school on Wednesday, killing at least 17 people, both adults and children.
This is how events unfolded in one of the 10 deadliest mass shootings in modern US history, according to law enforcement authorities, school officials and witnesses. All times are Eastern.
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