Putin

Biden and Putin to hold call amid Ukraine invasion fears

It comes after Secretary of State Antony Blinken said the US had evidence that Russia had made plans for a "large scale" attack on Ukraine.

But he added it was unclear if Mr Putin had made a final decision to invade.

Russia has denied any such intention, and accused Ukraine of executing its own troop build-up.

Russia election: Putin to run again for president

He made the announcement in a speech to workers at a car factory in the Volga city of Nizhny Novgorod.

"I will put forward my candidacy for the post of president of the Russian federation," he said.

Mr Putin has been in power since 2000, either as president or prime minister. If he wins the March election, he will be eligible to serve until 2024.

Russian TV journalist Ksenia Sobchak has already said she will stand in the election but opinion polls suggest Mr Putin will win easily.

Snowden says It's a 'Dark Day for Russia' after Putin Signs Anti-Terror Law

The new legislation signed by Putin would compel the country's telephone carriers and Internet providers to record and store the private communications of each and every one of their customers for six months – and turn them over to the government if requested.

The data collected on customers would include phone calls, text messages, photographs, and Internet activities that would be stored for six months, and "metadata" would be stored up to 3 years.