Russia-Ukraine updates: Russian missiles hit close to nuclear reactors: IAEA director

Twenty people are dead and 59 are wounded from Russia's missile strike on Monday at a mall in the central Ukrainian city of Kremenchuk, according to Kyrilo Tymoshenko, the deputy head of the Office of the President of Ukraine.

Forty people remain missing, Tymoshenko said.

"Several fragments of bodies have been found ripped off limbs and feet of the people," Ukrainian President Volodymyr Zelenskyy told the United Nations Security Council.

He said if Russia denies the devastation was wrought by one of its missiles, he asked the U.N. send an independent representative to the site of the attack to verify for itself.

First Deputy Permanent Representative of Russia to the U.N., Dmitry Polyanskiy, flatly denied carrying out strikes against any civilian target.

-ABC News' Shannon Crawford, Oleksii Pshemysko and Fidel Pavlenko

Sean Penn met with Ukrainian President Volodymyr Zelenskyy in Kyiv on Tuesday after the actor arrived in Ukraine to shoot a documentary, according to Zelenskyy’s office.

Penn, who first came to Ukraine on the day Russia invaded in February, wants to "visit settlements in Ukraine affected by Russian aggression," according to Zelenskyy’s office.

President Joe Biden and Spanish President Pedro Sanchez delivered remarks Tuesday on new areas of cooperation between the two countries and efforts to keep supporting Ukraine against Russia's invasion.

Biden did not mention Monday’s strike on the Ukraine mall that killed 18, but said the invasion has "shattered peace in Europe and every norm since WWII."

Biden said he and Sanchez discussed the need to continue to provide weapons to Ukraine.

The Ukrainians "are standing up in ways that I don't think anyone anticipated, showing enormous bravery, enormous resolve," Biden said.

He said he believes Putin's objective is to "wipe out the culture of Ukraine."

Biden said NATO allies will be "standing as one" to support Ukraine and teased more military posture commitments in Europe. Biden said the U.S. and Spain are working on an agreement to increase the number of Navy destroyers stationed at Rota Naval Base in Spain.

-ABC News' Justin Ryan Gomez

Russia announced Tuesday that it was banning the wife and daughter of U.S. President Joe Biden from entering the country.

The Russian Ministry of Foreign Affairs said the names of 25 U.S. citizens were added to the country's "stop list," including Biden's wife Jill and daughter Ashley. The ministry also banned entry to U.S. Sens. Mitch McConnell, R-Ky., Susan Collins, R-Maine, Ben Sasse, R-Neb., and Kirstin Gillibrand, D-N.Y., whom it identified as "responsible for the formation of the Russophobic course."

"This was done in response to the continuous expansion of U.S. sanctions against Russian politicians and public persons," the ministry said in a statement Tuesday.