The unfolding horror of the Paris terror attacks was captured through the lens of social media.
But now events themselves have ended, online networks are being used to document an all together different situation: the desperate search for missing loved ones.
#rechercheParis#PorteOuverte and #rechercheBataclan are the hashtags curating appeals about those who are missing, while at the same time providing perhaps the clearest example yet of the true human cost of the near-simultaneous incidents.
There are stories of reunions, of those missing being found, and of remarkable escapes.
But harrowing updates, appearing with greater frequency as we enter the second day since the attacks, confirm the worst news.
Here are a small number of the appeals made online. We've included updates where they could be found.
They make for difficult reading
Marie, missing alongside boyfriend Mathias
Update: the worst was confirmed
Émilie since found safe
Cécile and Luis
Update: reportedly safe
Elsewhere, Facebook's safety tool activated on Friday to allow those in Paris to update their friends as to their safety.
Mark Zuckerberg, the site's founder, announced the feature in a status, writing: "My thoughts are with everyone in Paris tonight. Violence like this has no place in any city or country in the world."
WHAT WE KNOW SO FAR:
- 129 dead, French prosecutor says, with 352 injured, 99 critically
- Locations targeted in suicide bombings and shootings
- 89 slain at Bataclan concert theatre after hostage situation
- Restaurants, football stadium attacked in night of horror
- Police leave cancelled and around 1,500 soldiers mobilised
- French border controls increased, state of emergency declared
- Seven extremists in three teams carried out attacks, all killed
- Manhunt under way for accomplices, arrests made in Brussels after police raids
- David Cameron chairs meeting of Government Cobra committee
- Paris Attacks: At Least 127 Dead After Shootings, Suicide Attacks And Hostage Situation In Capital
- Paris Theatre Attack: At Least 100 Dead At Bataclan, Officers Describe Scene Inside Theatre As 'Carnage'
- The Moment An Explosion Rocked A Football Match In Paris
- Paris Attacks Prompt #TerrorismHasNoReligion Twitter Hashtag
- Paris Attacks: David Cameron To Chair Emegency Cobra Meeting As UK Threat Level Remains 'Severe'
- Rob Lowe Faces Backlash Over 'Borders' Tweets Following Paris Terrorist Attacks