Hoax bomb threats lead to lockdowns and evacuations in dozens of elementary and high schools across both the US and UK on Monday. In the UK thousands of children in at least 21 schools were evacuated after bomb threats were phoned in to police. One anonymous caller said that the resulting shrapnel would “take children’s heads off.” Classes resumed only after police failed to find any explosives or other dangerous items. Today, nine more UK schools in Devon, North Wales, Northern Ireland, South Lanarkshire and across central Scotland were evacuated following malicious phone threats. RT reports: The threats led to the evacuations of schools in Colorado, Connecticut, Delaware, Minnesota, New Hampshire, New York, Oregon, Utah and Wisconsin. A wave of threats directed at schools in 12 states across the nation forced authorities to lock down or evacuate. https://t.co/eIOQXIULPW — USA TODAY (@USATODAY) May 24, 2016 Media outlets in the United Kingdom also reported evacuations at dozens of schools up and down in that nation. Bomb threats force 21 schools across UK to evacuate during exam season https://t.co/rqGyQi80HT pic.twitter.com/T5BtU3RfG2 — RT UK (@RTUKnews) May 23, 2016 Some officials described the calls received as automatic or robotic. Schools in Denver and Minnesota [...]