Russia on Monday urged foreign citizens, including members of diplomatic missions, to leave the Ukrainian capital as quickly as possible and told residents to steer clear of military and government facilities.

A massive black cloud rising above the St. Petersburg skyline from a Ukrainian drone strike set a gloomy tone for the opening of President Vladimir Putin’s annual showcase of Russia’s economic achievements.

Ukraine says it struck five ships carrying illegal cargo in the Sea of Azov and in coastal waters of Russian-occupied territories.

Ukraine is significantly expanding its long-range drone attacks on targets across Russia -- including the capital Moscow -- according to data published by the Russian Defense Ministry, as the Kremlin's four-year-old full-scale invasion of its neighbor grinds on with little apparent hope for a peace deal or for the Russian victory that President Vladimir Putin has framed as inevitable.

The humiliating strike to the Kremlin erupted just 10 miles from the glitzy venue where Putin is hosting his annual "Russia's Davos" showcase, which saw high profile guests arriving as blasts rang out and smoke flooded the air.

What happened to the Russian vessels? The Defense Forces of Ukraine have struck ships and infrastructure facilities in the port of Kronstadt in Russia's Leningrad region, according to the General Staff of the Armed Forces of Ukraine and the commander of the Unmanned Systems Forces,

Ukraine also struck a Russian warship at a naval facility near St. Petersburg as guests flocked to the city for Russia's flagship economic forum.

The 412th Nemesis Brigade calls the Morrigan its "secret weapon" in the mid-range, a new style of attack Ukraine has been intensifying recently.