The buildings were seized by an unknown armed group at around 4am local time, according to the Prime Minister of Crimea Anatoly Mogilyov, who added it was not yet clear who those people were.
The men wore black and orange ribbons, a Russian symbol of the victory in World War II, according to AP. They placed a Russian flag on top of the Council of Ministers, one of the occupied buildings.
<blockquote class="twitter-tweet" lang="en"><p>Ну началось #Симферополь#Крым#Crimea#Simferopol <a href="https://twitter.com/search?q=%23%D1%81%D0%B8%D0%BC%D1%84%D0%B5%D1%80%D0%BE%D0%BF%D0%BE%D0%BB%D1%8C&src=hash">#симферополь</a> <a href="http://t.co/wEgF8m6uss">pic.twitter.com/wEgF8m6uss</a></p>— Фото из Симферополя (@InstaSimferopol) <a href="https://twitter.com/InstaSimferopol/statuses/438962177903697920">February 27, 2014</a></blockquote>
Crimea is an autonomous republic within Ukraine and has its own prime minister, who is appointed in agreement with central government in Kiev.
Some local pro-Russian groups, fearful of the nationalist rhetoric emanating from Kiev in recent days, have called for Crimea to secede from Ukraine and asked for Russia to intervene. Pro-Russian demonstrations, where protesters wave Russian flags, have been held in several regional cities since the weekend.