Vladimir Putin has ordered an invasion of Ukraine and said he wants to 'demilitarise' and not occupy the country.

It comes after explosions were heard near the Ukrainian port city of Mariupol, as fears mount that shelling is underway.

Residents in the city, which is located in south eastern Ukraine, have been woken up at 3.30am this morning by blasts 30 miles from the Russian border.

Video footage appeared to show clouds of smoke rising up into the night sky near Mariupol, but it was unconfirmed whether it was as a result of shelling.

Putin earlier this week said he wanted to take the major Azov Sea Port of Mariupol, which handles 50 per cent Ukraine's steel and mineral exports.
The explosions come just hours after the U.S. warned the Ukrainian government that Putin's troops are 'ready to go now' with an invasion of Ukraine, with 80 per cent of Russian soldiers now assembled around the country in attack positions.

U.S. Secretary of State Anthony Blinken issued a further stark warning and said he believed Russia will invade before the night is over.

And in a further worrisome move, Russia issued a notice to airmen (NOTAM) which closed the airspace along its northeastern border with Ukraine to all civilian air traffic. Ukraine later said early on Thursday it had restricted civilian flights in its airspace due to 'potential hazard'.

Ukraine's President Volodymyr Zelenskyy earlier tonight vowed that the Ukrainian people will 'fight back' if Putin threatens their freedom and lives by launching a full-scale invasion.

President Zelenskyy made an emotional address to his nation after Moscow-backed rebel leaders in eastern Ukraine asked Putin for military assistance in fending off Ukrainian 'aggression' - a move which has fuelled fears the Russian strongman will use it as an excuse to invade Ukraine.

In an emotional televised address tonight, President Zelenskyy said: 'The people of Ukraine and the government of Ukraine want peace.

'But if we come under attack, if we face an attempt to take away our country, our freedom, our lives and lives of our children, we will defend ourselves. When you attack us, you will see our faces, not our backs.'

The Ukrainian President said he had tried to call Putin this evening, but there was 'no answer, only silence', adding that Moscow now has around 200,000 soldiers by Ukraine's borders.

The United Nations Security Council quickly scheduled an emergency meeting Wednesday night - the second in three days - at Ukraine's request. Ukrainian Foreign Minister Dmytro Kuleba called the separatists' request 'a further escalation of the security situation.'



earlier today, Ukraine was placed on a war footing: A state of emergency was declared and approved by parliament, 200,000 military reservists called up, border zones were