New Round Of Robo-Call Bomb Threats Directed At Massachusetts Schools

BOSTON (CBS) -- More than 30 schools across Massachusetts received another wave of robo-call bomb threats Thursday morning.

"No hazardous devices have been found at any sites as of this time," State Police spokesman Dave Procopio said in a statement.

The threats come just three days after a similar round of robo-calls sent police responding to schools across the state.

"As previously noted on various dates earlier this year, we believe the robo-call threats are delivered to targeted destinations through an online network or networks via numerous routers," Procopio said.

No other information is available at this point in the investigation.