Facebook has launched a check-in feature to let people know that friends in Paris are safe after the terror attacks that have killed more than 100 people.
The Paris Terror Attacks safety check lets people signal whether they are out of harm's way, then notifies all those they know at the leading social network.
"Quickly find and connect with friends in the area," a message at the Facebook Safety Check page reads. "Mark them safe if you know they're OK."
The feature also allows people to check which friends listed as being in Paris are yet to check in as safe.
"We are shocked and saddened by the events unfolding in Paris," a Facebook spokesman told AFP.
"Communication is critical in these moments both for people there and for their friends and families anxious for news."