President Barack Obama called Tuesday's terror attacks in Brussels "outrageous" and pledged that America would help bring justice to those responsible in a brief address during his visit in Cuba.

At the opening of a speech about his trip to Cuba, Obama spoke about a series of what he called "terrorist attacks" that killed dozens of people in the Belgian capital on Tuesday.

"We stand in solidarity with our allies in Belgium," Obama said. "We will do whatever is necessary (to help Brussels) bring those responsible to justice."

During his remarks, Obama urged people around the world to put aside differences in uniting to defeat terrorists.

"We must be together, regardless of nationality or race or faith, in defeating the scourge," the president said.

Obama was briefed about the attacks shortly after they happened and was in contact with Belgian officials, according to the Associated Press.

Secretary of State John Kerry issued a statement declaring that the United States was trying "to determine the status of all American citizens in Brussels."

Clint Davis is a writer for the Scripps National Desk. Follow him on Twitter @MrClintDavis.