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Texas high school shooting

Polk County Sheriff's Office / Facebook Live video

Many Tampa Bay area law enforcement agencies are acting in what officials call an abundance of caution by increasing their presence in and around schools in the final days of the school year. 

Updated at 10:45 p.m. ET

At least 10 people were killed when a gunman opened fire inside a small-town Texas high school, in what Gov. Greg Abbott called "probably the worst disaster ever to strike this community."

Ten others were wounded in the morning attack at Santa Fe High School.