Paris Flight Cancellations And Delays: After Shooting, Explosions, Hostage Crisis, Air Carriers Delay Travel To France

In the wake of violent terrorist attacks that killed over 150 people in Paris, American Airlines held at least five departures set for Paris Friday night, according to a tweet. French airports and train service, however, remained open.

"Currently Charles de Gaulle International Airport is open, however, we are holding our remaining departures this evening to Paris until we have additional information," American Airlines spokesman Joshua Freed said, Reuters reported.

Three United Continental Holdings flights remained on schedule to depart for Paris on Friday evening from Chicago, Newark, New Jersey and Washington, D.C. A Delta spokesperson had no comment.

French President Francois Hollande announced a state of emergency Friday night and closed the state's borders after at least 153 people were killed in five separate, coordinated attacks, which included shootings and explosions. Among the victims, 112 people were reportedly killed at the Bataclan concert venue, according to the Interior Ministry. Hollande called the attacks "unprecedented terrorist attacks" and described the situation as a "horror."

"Faced with terror, this is a nation that knows how to defend itself, how to mobilize its forces and once again, knows how to overcome the terrorists," Hollande tweeted Friday night.

As a result of the attacks, Paris agencies announced that all metro stations had been closed in the city and universities in the area would be closed Saturday. It has not yet been confirmed who is responsible for the attacks.

"This is an attack not just on Paris. It's an attack not just on the people of France. But this is an attack on all of humanity and the universal values we share," U.S. President Barack Obama said Friday after the attacks.