Officials announced Saturday that two of six derailed train cars containing hydrochloric acid and ethylene oxide began leaking, causing the evacuation of 3000 residents from Lafayette, Louisiana.

According to CNN, fumes started to rise above the location of the trains and people from homes, business centers and a nursing home were evacuated in one mile radius. They were told that at least 48 hours would be necessary for the site to clear. Local firefighters and state police said that everyone in the area should leave.

Lt. Craig Stansbury of the Lafayette Parish Sheriff's Office said that officers went to every door to announce people to leave and that a shelter was made at Carencro High School.

Authorities also informed the residents outside the evacuation area and told them that it was for the best to close windows and doors and turn off air conditioning, thus avoiding any contamination.

CBS News reported that Acadian Ambulance official Clay Henry said that two railroad employees had been taken to a hospital for possible exposure. Hydrochloric acid is often used in metal cleaning and electroplating. It can cause irritation to the skin.

The Federal Railroad Administration agency announced will conduct an investigation of the incident.