MOSCOW, May 30 – Yandex is taking legal advice following a raid of its offices in Ukraine on Monday and accusations its employees passed personal data about Ukrainian users to the Russian special services.

"Two weeks ago, Ukraine sanctioned Yandex.Ukraine and Yandex LLC, subsidiaries of Yandex N.V. and blocked Ukrainian users from accessing our services and websites. Today, Ukrainian Security Service (SBU) conducted searches at Yandex offices in Kiev and Odessa," the NASDAQ-traded Russian Internet company said in a statement.