Diplomatic Threat
Perpetrator threw Molotov cocktails, damaging facade and windows.
Russian House operates under Rossotrudnichestvo, a state-funded cultural agency.
Czech authorities refuse to call it a diplomatic building, citing state propaganda.
Police stated investigation started after yesterday's attack.
Russian House head said three of six cocktails failed to ignite.
Foreign Ministry called attack 'barbaric.'. Rossotrudnichestvo deputy head called it terrorism.
Russian officials request increased security for diplomatic facilities.
2 hours ago