Students at schools in Bristol have been spending their last days of the school year with heightened security.
After a number of bomb threats at several schools, school and city leaders said they were taking the threats very seriously.
Three students, two 10-year-old girls and one 13-year-old girl, were arrested. Police said they expect to make more arrests soon.
The city's mayor said neither he nor the school district would back down. He hoped beefed up security would put an end to the rash of threats.
"It's copycat kids that have been doing this," said Mayor Ken Cockayne. "They thought it was a game and it's not a game."
In a two-week span, there were a total of eight different threats at elementary, middle and high schools.
Cockayne said there was increased staff at the schools. Those staff members would also use undercover tactics to keep the buildings safe through the end of the school year. He hoped it would send a strong message to students to stop the threats.
"Don't do it," said Cockayne. "Because you will get caught and we will prosecute you to the fullest extent of the law."
Schools were using video camera surveillance in several interior and exterior school locations to monitor student activity. There was also an increased police presence. The staff also implemented a mandatory sign-in and sign-out procedure for students.
Assemblies were also on the agenda for each grade to discuss safety and security.
The mayor, along with police, said they've focused on a certain people they believe were responsible for the threats. They said they expected at least one more arrest would come shortly.
"I know two of the schools with past bomb threats have very good leads and they're following up on them," said Cockayne. "When those arrests will come, I don't know."
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