Uber service appeared to be briefly disrupted in Paris amid a series of deadly attacks Friday night that wreaked havoc on transportation systems across the city and kept many bus and train stations closed into Saturday morning. Uber service was fully available again by Saturday morning.

“Our hearts go out to everyone in France after these horrific terrorist attacks,” an Uber spokesperson said.

More than 120 people were killed in the coordinated attacks. President Francois Hollande shut France’s borders and declared a national state of emergency, saying, “This is a terrible test, another assault on France.”

Parisian Uber users saw an “Emergency Situation” message when opening the app that said: “Attacks are underway in Paris and its surroundings. The Prefecture of Police of Paris has asked that you stay safely inside. Do not travel unless absolutely necessary. Nearly all the drivers are busy. Uber France.” An Uber spokesman said service was not suspended but that there was a “huge demand” and no cars available because all drivers are busy. “You can’t realize what is happening, it’s a nightmare,” the spokesman said.

The message changed from earlier, when it read: “Service Disrupted: We’re doing the maximum to help Parisians in their travel, and particularly tonight. If possible, submit your travel [request] later. Take care of yourself, Team Uber.”

Parisians also began using the hashtag #PorteOuverte, which means “open door,” to offer shelter for those seeking safety.

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