SIMFEROPOL, Ukraine — A top Ukrainian security official says two airports in Crimea are under Ukrainian control despite attempts by gunmen to “seize” them.

Ukraine’s Interior Minister early today had said Russian navy troops were blocking access to the airports in Simferopol and Sevastopol, describing it as a “military invasion and occupation.”

But Ukraine’s Security Council Chief Andriy Parubiy insisted later today the airports were still under Ukrainian control, according to the Interfax news agency.

Parubiy said the gunmen had set up checkpoints outside the airports. “But de-facto the airports are controlled by the law enforcement bodies of Ukraine.”

Ukraine’s State Border Guard Service said about 30 Russian paratroopers from the 810th brigade of Russia’s Black Sea Fleet had taken up position outside the Ukrainian Coast Guard base in the Sevastopol area. It said the paratroopers said they were there to prevent any weapons at the base from being seized by extremists.

Russia’s defense ministry had no comment.

Any Russian military incursion in Crimea would dramatically raise the stakes in Ukraine’s conflict, which saw the pro-Russian president flee last weekend after three months of anti-government protests.

Moscow has vowed to protect Russian-speaking Ukrainians in Crimea, where it has a major naval base, and Ukraine and the West have warned Russia to stay away.

“I can only describe this as a military invasion and occupation,” Ukraine’s new interior minister, Arsen Avakov, wrote in a Facebook post today.

Avakov said the airports were controlled by Russian navy troops. Associated Press journalists approaching the Sevastopol airport found the road leading up to it blocked by two military trucks and a handful of gunmen wearing camouflage uniforms and carrying assault rifles.

A car with Russian military plates was stopped at the road block. A man wearing a military uniform with a Russian flag on his sleeve got out of the car and was allowed to enter on foot.

At the airport serving Simferopol, commercial flights were landing and taking off despite the armed men.

In Kiev, Ukraine’s parliament adopted a resolution demanding that Russia halt steps it says are aimed against Ukraine’s sovereignty and territorial integrity, and called for a U.N. Security Council meeting on the crisis.

Making his first public appearance since fleeing Ukraine, fugitive President Yanukovych pledged today to fight for his country’s future but said he will not ask for military assistance.

“I intend to keep fighting for the future of Ukraine,” he told a news conference today in the southern Russian city of Rostov-on-Don. Yanukovych had not been seen since Saturday.

“Any military action in this situation is unacceptable,” he said.

Yanukovych insisted he “did not flee anywhere” but left for the city of Kharkiv in eastern Ukraine.

He said he was “forced” to leave the country when he was in Crimea after his family received threats.

Yanukovych said he had not met Russian President Vladimir Putin in Russia but talked with him on the phone, adding that he hopes the Russian leader will find time to meet him.

Also today, authorities in Switzerland and Austria moved to block any assets that Yanukovych and his son might have hidden in the Alpine nations, while the Swiss launched a corruption investigation against them.