Heavy rains triggered severe flash floods in the same area as earlier this month.
With a maximum range of 600 km, the latest missile weapon system carried out live-fire exercises to hit a high-speed ballistic target at Kapustin Yar training ground, Russian defence ministry says.
Estonia's consul to Saint Petersburg has been detained for activities "incompatible with the status of a diplomatic worker" and "openly hostile" to Russia, the FSB security service said.
According to Russian media reports, none of the 28 people on board have survived the crash.
Moscow has called for the military exercises involving 5,000 NATO soldiers to be cancelled, threatening a response if necessary to protect national security.
US President Joe Biden’s first meeting with his Russian counterpart Vladimir Putin since assuming office comes amid soaring tensions between Washington and Moscow, with both sides playing down the prospect of any major breakthroughs at the summit.
Russian President Vladimir Putin, who is to meet US President Joe Biden in Geneva, says hundreds of Americans arrested after Capitol Hill insurrection have been subjected to "persecution for political opinions."
The meeting between Russian President Vladimir Putin and US President Joe Biden is due to take place on June 16 in Geneva amid strained bilateral relations on a wide array of issues.
The move is seen by some as part of a growing government effort to tighten control over social media platforms amid political dissent.
Moscow court outlaws organisations headed by jailed Kremlin critic Alexey Navalny as "extremist", rendering their staff liable to criminal prosecution.
Kremlin says US decision to withdraw from treaty “significantly upset the balance of interests” among pact members, compelling Russia to exit.
President Vladimir Putin signs legislation that bars members of "extremist" organisations from running for office, a decision allies of jailed Kremlin critic Alexey Navalny say aims to sideline them from parliamentary election this year.
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