Russian President Putin warns West of military measures over Ukraine threats

The United States has been sounding the alarm since mid-November that Moscow could be planning a large-scale attack on its ex-Soviet neighbour Ukraine and has warned Putin of unprecedented sanctions.

Western governments have accused Moscow of amassing some 100,000 troops near its border with eastern Ukraine, where Kiev has been fighting pro-Russia separatists since 2014.

Russia denies plotting an invasion and has demanded legal guarantees over its security from the United States and NATO, demanding the alliance stop an eastward expansion.

Last week Moscow presented demands to the United States and NATO saying the alliance must not admit new members or establish military bases in ex-Soviet countries.

In his first call with German Chancellor Olaf Scholz, Putin Tuesday said he wanted "serious negotiations" on the demands, and accused Ukraine of violating 2015 ceasefire agreements.

'Doorstep of our house' 

Putin said Tuesday that Russia was "extremely concerned" over what he said was US missile deployments in Poland and Romania, which he said would soon be capable of launching Tomahawk cruise missiles.

"If this infrastructure moves further -- if US and NATO missile systems appear in Ukraine -- then their approach time to Moscow will be reduced to seven or 10 minutes," he said, adding that the time would be cut even shorter with hypersonic weapons.

Despite hinting at conflict, Putin said that Russia wants to avoid "bloodshed".

"We want to resolve issues by political and diplomatic means," he said.

But the Russian leader repeated grievances over Washington's support for Ukraine, which includes training Kiev's forces and committing to them more than $2.5 billion.

Those actions, Putin said, are taking place "at the doorstep of our house".

Even if Moscow receives US security guarantees, Putin said he would be wary of them because "the United States easily withdraws from all international treaties that for one reason or another become uninteresting to them".

The West has warned that Putin could use the pretext of provocations in Ukraine to launch a full-scale attack, while Russia's defence minister Sergei Shoigu accused Washington of plotting "provocations" in eastern Ukraine.

Zelensky seeks 'clear timeline'

Ukraine's President Volodymyr Zelensky meanwhile voiced frustration over NATO's reluctance to speed up Kiev's membership in the alliance.

"We cannot accept the theory that is now very popular about (Ukraine joining) the EU in 30 years and NATO sometime in about 50 years," Zelensky said during a meeting with Ukrainian ambassadors Tuesday.

"It demotivates us and slows us down."

Ukraine wanted to get a "very clear timeline" from NATO on the prospect of membership in 2022, he added.

Although Kiev has for years been seeking to join the US-led alliance, Western officials have on numerous occasions said this is not on the cards any time soon.

Ukraine and its Western allies say Moscow has long been involved in the Ukraine conflict, sending troops and weapons to support the separatists in fighting that has claimed over 13,000 lives.

Russia denies the claims and has warned that Kiev has mobilised half its forces to the eastern conflict zone.

In 2014, Ukraine's military was unable to stop Russia seizing Crimea and pro-Moscow separatists grabbing two regions in the Russian-speaking east soon after.

But Kiev's forces have since modernised and acquired attack drones from NATO member Turkey, which drew an angry response from Putin when Ukraine deployed them in October.