A number of people have been injured in the collision, which took place at about 12.30pm this afternoon.
It is not yet known why the van drove into pedestrians.
Eyewitnesses have reported seeing at least three people injured, including an elderly woman.
Cllr Antonio Piazza for Drynham, the Conservative leader of the council, wrote on Twitter: “Please can everyone avoid this part of Trowbridge today. I will provide an update if possible when I learn more.
“A van is believed to have ploughed into multiple people near The Shires Shopping Centre.”
More to follow…