"In fact, we have demonstrated full solidarity with the United Kingdom. Currently, as our country holds the presidency of the European Council, we believe we need to maintain a channel of communication with Russia," the prime minister said following the Bulgarian Security Council’s meeting, as quoted by Kanal 3 TV channel.
Borisov added that, on Tuesday, Bulgarian Ambassador to Russia Boyko Kotzev had been recalled for consultations and would stay in Sofia for one more week.
Skripal, a former colonel in Russia's GRU intelligence service who also worked for UK intelligence, and his daughter Yulia have been in hospital since March 4. London believes that the Skripals were exposed to the A234 nerve agent, which UK experts have claimed is related to the Novichok-class nerve agents developed in the Soviet Union. UK Prime Minister Theresa May has said Russia was "highly likely" behind the attack.
Russia, in turn, has strongly rejected the accusations. Moscow has repeatedly offered assistance in the investigation, however its requests for samples of the chemical substance allegedly used to poison Skripal have been rejected.