The latest warnings come amid rising concerns ⁠⁠⁠⁠⁠⁠⁠⁠in Europe about hybrid warfare threats. ⁠More than 1,800 ⁠schools in Italy were sent emails containing bomb threats on Thursday, the government said, a day after some 6,300 schools received similar alerts. Many schools closed immediately after receiving the latest warnings, causing widespread disruption as parents rushed to collect their children. Police in Rome said “there was nothing to substantiate” the threats.