Simferopol airport operations reported normal after armed men, wearing similar gear to a group of 100 gunmen who stormed the Crimean parliament and raised the Russian flag, entered the building.

Russian military were blocking an airport in the Black Sea port of Sevastopol in Crimea, near the Russian naval base, while unidentified men were patrolling another airport serving the regional capital Simferopol, Ukraine’s new Interior Minister Arsen Avakov said on Friday.

Mr. Avakov wrote in a Facebook post that the Belbek international airport in Sevastopol was blocked by military units of the Russian navy. “I can only describe this as a military invasion and occupation,” he said.

The Russian foreign ministry refused to comment while a spokesman for the Russian defence ministry was not available for comment.

Early on Friday, around 50 armed men in military uniform arrived in three trucks without licence plates and surrounded the domestic flights terminal at the airport of Simferopol, the regional capital of Crimea, before moving on to other parts of the site, Interfax-Ukraine news agency cited witnesses as saying.

Soldies said they came to the airport to prevent Ukrainian  'militants' from entering Crimea.