Ukraine says it has uncovered a spy network being run by the Hungarian state to obtain intelligence about its defences near their shared border.

Ukraine’s security service said it had detained two alleged Hungarian spies who it accused of gathering intelligence.

“For the first time in Ukraine’s history, the Security Service has exposed a Hungarian military intelligence network that was conducting espionage activities to the detriment of our state,” the SBU said.

Hungary is a member of the European Union and Nato - both firm allies of Ukraine - but President Viktor Orban has repeatedly sided with Russia since its invasion of Ukraine. The Hungarian government has not responded to the claims.