Manchester Arena explosion: What we know so far

A horrifying terrorist attack took place last night at an Ariana Grande concert at Manchester Arena. Here’s what we know so far:

Social media users are using the hashtag #ManchesterMissing to help trace missing concert-goers in the wake of the attack.

Manchester Police have set up an emergency number – 0161 856 9400 – for those who are concerned about relatives or loved ones who may have been in the area.

Facebook has activated its Safety Check function, which allows users who were in the area to tell family that they are safe.