Haverhill police detectives John Moses and Carl Rogers are investigating both incidents. Pistone said that as of this afternoon, police increased patrols of bus routes and had officers riding on buses. He said extra patrols of bus routes will be in place tomorrow, along with officers riding on school buses.
"If this is some sort of prank, it's certainly a sick joke, a sick prank in light of what's happened," Pistone said in reference to last Friday's deadly shootings in an elementary school in Newtown, Conn.
Watch eagletribune.com for updates. Tomorrow's Eagle-Tribune will have a full report.