Media playback is unsupported on your device

Ukraine crisis: Sevastopol ships 'defended' with mattresses

4 March 2014 Last updated at 09:31 GMT

Ukrainian warships in Sevastopol have spent the night draped with mattresses, to slow down any Russian troops attempting to board using grappling hooks.

On Saturday, at a UN Security Council meeting, Moscow's envoy claimed that ousted Ukrainian President Viktor Yanukovych had asked Russia to send troops across the border to protect civilians.

Ukraine's main military bases on the Crimean peninsula remain surrounded by Russian forces.

An alleged ultimatum for Ukrainian forces to surrender - denied by Moscow - expired without incident.

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.