Students leave the British International School yesterday with the assistance of police. (Photo: MTI/Zoltán Mihádák)

The Hungarian Police reported that they received a notice between 8 a.m. and 10 a.m. yesterday, and launched a criminal investigation against an unknown perpetrator for threatening public safety, Hungarian online daily index.hu said.

Index.hu added that similar threats were reported yesterday at a school in Stockholm and at four schools in England’s West Midlands region, however, evidence has not yet shown that there is a correlation between these events.

Hungary’s British International School received a similar bomb threat on December 9.