iStock/Thinkstock(LONDON) — Witnesses to a terrorist attack in which an assailant apparently plowed a car into pedestrians and an officer was stabbed near the Houses of Parliament in London described a chaotic scene Wednesday afternoon, with injured people lying sprawled in all directions.

At least one victim was killed in the attack, according to the BBC.

More details about what transpired are not yet known, but Richard Price, an eyewitness, told ABC News that he saw police steering people away from the area where the attack took place.

Another eyewitness told the BBC that someone driving a car on Westminster Bridge appeared to hit bystanders and that paramedics were treating people on the ground.

British lawmaker Grant Shapps said on Twitter that he was walking through the cloisters of the House of Commons and heard “four gunshots.”

Radoslaw Sikorski, a former foreign minister of Poland, posted a video on Twitter that seems to show people lying injured in the road on Westminster Bridge.

Sikorski, now a senior fellow at Harvard’s Center for European Studies, wrote, “A car on Westminster Bridge has just mowed down at least 5 people.”

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