The Czech Republic's interior minister says officials are reviewing security after a government news conference was interrupted by pro-Ukrainian protesters.

Two men disrupted a news conference given Wednesday by Prime Minister Bohuslav Sobotka, Deputy Prime Minister Belobradek and Defense Minister Martin Stropnicky.

The protesters sitting among the journalists stood up and unveiled EU and NATO flags. Naked to the waist, they had Ukrainian flags painted on their bodies along with appeals to Sobotka not to side with Russian President Vladimir Putin against Ukraine.

Interior Minister Milan Chovanec said members of the government were not in danger and the two protesters were unarmed. They were briefly detained, and police say they may be fined.