The #PorteOuverte hashtag was again used to offer sanctuary to those caught up in a terror attack in France on Thursday.
The phrase, which translates to “Open Door,” trended on Twitter after a driver identified as Mohamed Lahouaiej Bouhlel drove a truck into a packed crowd watching a Bastille Day fireworks display in Nice. At least 84 people were killed.
People mostly used the hashtag and its local variation, #PorteOuverteNice, to offer survivors a safe place to stay.
Others also posted details about free transportation:
The hashtag first came to prominence in November 2015 when 130 people were killed in Paris in terror attacks coordinated by the self-proclaimed Islamic State.
Freelance French journalist Sylvain Lapoix launched the social movement with this single tweet, which immediately went viral:
”Those who can open their doors, geotag your tweets and [use] #PorteOuverte to indicate safe places,” it read.
Lapoix later told French TV he came up with the hashtag while having “presence of mind for a minute.” “It took me two seconds to tweet,” he added, “and after that, for hours and hours, people gave their trust and their time.”