Photos: President Trump's call to Theresa May on the #Westminster attack

“I was just getting an update on London. Some big news having to do with London just happened,”

President Trump told reporters Wednesday at the White House, following a briefing with his national-security adviser H.R. McMaster. Around 2:30 p.m. local time, a police officer was reportedly stabbed in Parliament and an assailant was allegedly shot by responding officers. Scotland Yard said it is treating the situation as a possible terror attack.