Hundreds evacuated and dozens hospitalized after an ammonia gas leak in Oklahoma

Hundreds of people were evacuated from a city in Oklahoma and others were told to shelter in place after a tanker truck that was leaking in a hotel parking lot spewed a plume of anhydrous ammonia gas, authorities said Thursday. The gas release happened shortly before 10 p.m. Wednesday. At least 500 to 600 people were in a shelter as of Thursday morning, authorities said.