You cannot rule out the critical role of Facebook in people’s safety or compromise of it today.

After reports of an attack aimed at civilians in London, the social network has activated its “Safety Check” feature.

The safety feature enables people within an area of incident to confirm to their relatives if they are okay.

The tool has been used in the past to inform friends and family about the welfare of individuals near a crisis.

Metro UK reported that the tool has been used in the past during the Orlando attack and the attack at the Westminster Bridge.

The Telegraph reported that it is the third time that the feature has been activated in the United Kingdom.

The page is called, “The Attack in London, United Kingdom,” and individuals can check in as safe.

Facebook first introduced the feature in 2011, and it was mainly used during natural disasters, like earthquakes. In 2015, it was used during the Paris attacks.

Fox Business reported that the safety check has been activated more than 600 times in two years and was last used in the UK last March during the Westminster attack in London.