(CNN) A van mowed down pedestrians as it sped down London Bridge on Saturday night, leaving bodies lying in the roadway, a witness to the incident told CNN.
Mark Roberts said the van was traveling south across the River Thames at a high rate of speed and was swerving as it struck several people, knocking one person “about 20 feet into the air.”
The van swerved into oncoming lanes before hitting a bus stop and coming to a stop, Roberts said.
“Within my line of sight, there were five or six people on the ground that were not moving,” he said. “It looked to me that the van was aiming at the people.”
Roberts said he heard what sounded like gunshots about 10 minutes later. He estimated 100 people were on the bridge at the time, fewer than earlier in the night because it was getting late.
“I froze, to be honest,” Roberts said. “As I was thinking … which direction should I run, the van swerved across the other side of the bridge from me.”
London’s Metropolitan Police have not issued a report, saying only that an “incident” occurred on the bridge.