President Donald Trump spoke to British Prime Minister Theresa May on Wednesday after an attack outside Parliament in London left at least five dead, including the attacker.

“President Donald J. Trump spoke today with Prime Minister Theresa May of the United Kingdom to offer his condolences on today’s terror attack in London and his praise for the effective response of security forces and first responders,” the White House said in a statement. “He pledged the full cooperation and support of the United States Government in responding to the attack and bringing those responsible to justice.”

White House press secretary Sean Spicer also addressed the incident during Wednesday’s daily press briefing.

“We obviously condemn today’s attack in Westminster, which the United Kingdom is treating as an act of terrorism,” Spicer told reporters. “We applaud the quick response that the British police and their first responders made to this situation. The victims in this are in our thoughts and our prayers. The city of London and Her Majesty’s government have the full support of the U.S. government in responding to the attack and bringing those to justice who are responsible.”

Read more on the incident here.