LONDON (AP) -- Britain's Parliament was locked down Wednesday after an attacker stabbed an officer and was then shot by police, and witnesses said a vehicle struck several people on the nearby Westminster Bridge. London police said they were treating the attack as a "terrorist incident until we know otherwise."
The threat level for international terrorism in the UK was listed at severe. The city was also on alert for the Thursday funeral of Martin McGuinness, former IRA commander.
Dennis Burns, who was just entering Parliament for a meeting, told the Press Association he heard a radio message saying an officer had been stabbed. Police and security rushed outside as he was going in.
"When I got inside I was wondering what the hell was going on and I saw dozens of panicked people running down the street," he said. "The first stream was around 30 people and the second stream was 70 people.