At least seven people remained hospitalized Friday from injuries they suffered from an ammonia leak in a small Oklahoma town as authorities focused on how the potentially deadly gas began spewing out of the tanker truck carrying it.
The leak Wednesday night from a truck outside a hotel in Weatherford forced at least 500 to 600 people to evacuate their homes early Thursday while others were ordered to remain inside theirs for several hours. Firefighters went door-to-door to tell those who needed to leave.
