Seven first responders who were exposed to fumes from a chemical fire last week at a Crosby, Texas, manufacturing plant have filed suit against the plant’s owner, alleging that the company’s negligence caused them “severe bodily injuries.”

The plaintiffs, who include police officers and medical personnel, say in the lawsuit that when they were dispatched to the Harvey-flooded Arkema chemical plant in the early hours of Aug. 31, they were not alerted that more than one explosion had already taken place. Exposed to strong fumes, they “began to fall ill in the middle of the road,” and “police officers were doubled over vomiting, unable to breathe.” The suit also states that medical personnel “became overwhelmed, and they began to vomit and gasp for air.”

According to the Harris County Sheriff’s Office, 15 sheriff’s deputies were sent to the hospital and released later on the morning of Aug. 31. Company officials described that smoke as “a non-toxic irritant,” and Harris County officials compared it to what escapes a campfire or barbecue pit.