At least 18 people were killed in a head-on collision of two trains in Halle, Belgium, near the capital, Brussels. The trains crashed during morning rush hour, and photos showed the front cars of both trains pushed into the air from the force of the collision. Overhead power lines were severely damaged, and many trains running between Brussels and the southwest part of the country have been cancelled. It’s unclear what caused the crash, and though an investigation has been launched, the first priority is getting medical care for the victims. Belgium experienced snow and freezing temperatures over the weekend, which could be a factor in the accident.