London police arrested a man Tuesday who they say crashed his car into the security barriers outside the Palace of Westminster.
The collision reportedly happened around 7:30 a.m. local time. London Ambulance Service said it took two people to the hospital, but their injuries aren't considered critical.
Counter-terrorism officers are leading the investigation into the incident, but officials say they're "keeping an open mind."
The Palace of Westminster is home to the U.K.'s Parliament. Both the House of Commons and the House of Lords are currently not in session.
Additional reporting from Newsy affiliate CNN.