The National Police Headquarters (ORFK) has confirmed that officers have finished inspecting the buildings of Hungarian schools that received bomb threats and found no explosives or detonation devices.

State Secretary Bence Rétvári said that according to data gathered at 11.30, 268 schools received bomb threats, 245 of them in Budapest and 23 outside the capital. All Budapest school districts have received threats, he said.

Prime Minister Viktor Orbán on Thursday morning said he is in contact with the interior minister over bomb threats received by multiple schools across Hungary.

"We will boost the security of the schools in question and investigate the bomb threats," PM Orbán said on Facebook.

Police spokesman Kristóf Gál said no explosives were found in the schools searched so far. "This supports [the theory] that the email, sent to hundreds of addresses with the same content, probably lacks all foundation," Gál said.

Government spokeswoman Eszter Vitályos said in a Facebook post today that "it can be clearly seen where Brussels' flawed migration policy leads to: it puts the whole of Europe at risk."

"This is the same Manfred Weber-led Brussels elite that has promised immunity to [Hungarian Tisza Party leader and MEP] Péter Magyar in exchange for representing Brussels' policy," she said.

"They're spreading fake news and lies and putting Europe, including Hungary, at risk."