For the second consecutive day schools across Italy received bomb threats on Thursday in what the government suspects to be a series of hoaxes.

Nov. 12 (UPI) -- For the second consecutive day schools across Italy received bomb threats on Thursday in what the government suspects to be a hoax.

About 1,800 schools across the country received threats on Thursday, a day after hundreds of schools in Italy and more elsewhere in Europe received similar threats. Schools in France also received threats.

The Italian government advised schools not to evacuate without "concrete evidence" that the threats present a legitimate danger.

Some schools in France were evacuated in response to the threats. French President Emmanuel Macron warned that it is too soon to determine whether the threats were tied to "foreign powers."

A rail station in Calais, France, was also the target of a bomb threat. The threat caused the service to delay trains in northern France and international routes.

"As I speak, we do not have sufficient elements to be able to make an attribution," Macron told reporters in Dublin, Ireland, during a meeting with international leaders. "We cannot say if foreign powers are behind these calls."

Schools in Northern Ireland and the Republic of Ireland were threatened on Wednesday.

Despite public officials characterizing the threats as likely hoaxes, parents in Italy have expressed concern about the response. Italian newspaper la Repubblica reports that people have protested against the headmaster of a school in Rome after dismissing a threat, calling for the government to issue national guidelines for how to respond to the threats.

Wednesday's email threats, sent to 6,300 Italian state schools, were signed by "Mikhail Andropov, leader of Vilayat di Misoginistan." This is not believed to be a real person.