Hackers hijacked a Taiwanese alumni email account to send mass bomb threats to thousands of schools across Europe, and Taiwan's government is now helping track down who did it.

• Thousands of public schools in Italy got bomb threat emails, forcing many to evacuate.
• The messages appeared to come from a Da-Yeh University email domain in Taiwan, but the school says a graduate's account was likely hacked or misused, and it has suspended the account and started an investigation.
• A second, more aggressive threat went out the next day from an account linked to a teacher in the Philippines, and schools in the UK, Ireland, and France also reported similar threatening emails.
• Taiwan's foreign ministry has reported the case to prosecutors and is working with authorities in other countries to trace the real source of the emails and stop cross-border cybercrime.

Outlook: Investigators in Taiwan and Europe are expected to keep digging into the hacked accounts to find who is actually behind the threats.