Five people were taken to the hospital on Friday morning following a hazmat incident in Coronado, officials said.
Officials shut down the area of Olive and G avenues just before 10:30 a.m. as they responded to the incident. By 12:30 p.m., the scene had been cleared.
The people taken to the hospital include a police officer and four construction workers; they inhaled some type of tar-like substance, police said.
Police were dispatched to the area for a report of a construction worker falling at a site. Responding officers discovered several people were showing symptoms of inhaling toxic fumes.
A hazmat crew responded and conducted air samplings of the building and determined there were unsafe levels of chemicals in the basement.
A city building inspector issued a stop-work order until all areas are deemed safe.
According to the Coronado Police Department, all of the people taken to the hospital were released before 8 p.m. Friday.