Hungary was among those countries, which decided to join the UK in expulsion of Russian diplomats later than others, that's why Moscow reserved the right to respond to Hungary's actions over Skripal poisoning.

Kanal24 informs citing sputniknews.com.

Russia has declared one Hungarian diplomat persona non grata in response to the country's hostile move towards Moscow in connection with the poisoning of ex-Russian intelligence officer Sergei Skripal and his daughter on British soil.

After the Russian Foreign Ministry summoned Hungarian Ambassador Janos Balla, it said in the statement that "a note of protest was handed to him [the Ambassador] and he was informed that in response to Hungary's unfriendly and unreasonable order to expul a Russian diplomat on the basis of the UK's unproven accusations against Russia over the so-called Skripal case, the Russian side declares an employee of the Hungarian embassy a persona non grata."

On March 30, Russia announced expulsion of Western states' diplomats in tit-for-tat after the UK and a number of European countries, as well as the US, Canada and Australia expelled Russian diplomatic staff. However, the actions of four countries, including Montenegro, Belgium, Hungary and Georgia, were left unanswered by Moscow, as they announced the anti-Russian punitive measures at the last moment.