The truck that crashed onto a Downtown Boston sidewalk and into a building did not appear to have been intentionally driven off the road, city officials said Tuesday afternoon as they investigated the incident.

Six people, including the truck driver, were injured when the vehicle crashed at the intersection of Washington and Kneeland streets, between Boston’s Chinatown and Theater District, around 12:45 p.m., police said. One person remained in critical condition as of 3 p.m.