President Donald Trump and Minnesota Gov. Tim Walz have spoken over the phone about the shooting at a Minneapolis Catholic school, a White House official confirmed.

Trump called to offer his condolences to the people of Minnesota and Gov. Walz thanked him for the support, a source familiar with the call told ABC News. Trump didn't call after Minnesota state representative Melissa Hortman was assassinated in June, the source said.

-ABC News' Hannah Demissie and Isabella Murray

President Donald Trump said he's been briefed on a shooting at a Catholic school in Minneapolis.

"I have been fully briefed on the tragic shooting in Minneapolis, Minnesota. The FBI quickly responded and they are on the scene. The White House will continue to monitor this terrible situation. Please join me in praying for everyone involved!" Trump wrote on his social media platform.

There are multiple victims from the shooting, which unfolded during morning drop-off at Annunciation Catholic School, sources told ABC News.

President Donald Trump on Wednesday said billionaire George Soros and his son should be charged under the RICO Act.

"George Soros, and his wonderful Radical Left son, should be charged with RICO because of their support of Violent Protests, and much more, all throughout the United States of America," Trump wrote on his social media platform.

"Soros, and his group of psychopaths, have caused great damage to our Country! That includes his Crazy, West Coast friends. Be careful, we’re watching you!" Trump added.

Soros' Open Society Foundations said Trump's accusations are "outrageous and false."

"The Open Society Foundations do not support or fund violent protests. Our mission is to advance human rights, justice, and democratic principles at home and around the world," the statement read. "We stand for fundamental freedoms guaranteed by the Constitution, including the rights to free speech and peaceful protest that are hallmarks of any vibrant democracy."

The White House's top economic adviser, Kevin Hassett, defended President Donald Trump's firing of Lisa Cook, telling reporters Wednesday morning that the president has the authority to do so.

"The president absolutely has authority to fire a Fed governor for cause. And I think the accusations are serious, and I look forward to seeing the outcomes of the dispute. I think that you know, and if it were me and I had made the mistakes on the mortgage forms that are accused, and I would either deny it because it was not true, or I would go on leave until people resolved the matter," Hassett said.

"And the fact that she's not doing that now suggests that she's being partisan, trying to make a partisan stance, which is contrary to the independence of the Fed," he continued.

Hassett said if he were in Cook's situation, he would take a leave of absence from the job.

Hassett was asked if there is an actual investigation into Cook and said that the case has been given to the Department of Justice. "My understanding is it's been handed off to the Justice Department for investigation," he responded.

Cook denies wrongdoing and said she will not resign. She also said Trump does not have the authority to fire her, and her attorney, Abbe Lowell, said they will be filing a lawsuit.

"His attempt to fire her, based solely on a referral letter, lacks any factual or legal basis. We will be filing a lawsuit challenging this illegal action," Lowell said on Tuesday.