Ukraine’s Security Service launched a raid on the country’s state-run gas company Wednesday, searching for documents related to a gas deal with Russia, a spokesman for the company said. A group of about 30 gunmen wearing masks and carrying machine guns entered the offices of Naftogaz and took control of every floor of the company’s building in the capital of Kiev, Naftogaz spokesman Valentyn Zemlyansky said. Operatives from the security service then began a search for various company documents, including those pertaining to the Russia-Ukraine gas deal signed in January to end a weeks-long gas dispute, Zemlyansky told journalists, according to Russia’s Interfax news agency