Georgina Callander, 18, Saffie Rose Roussos, 8, and John Atkinson, 26, were also among the casualties.

On Tuesday, there was a joint memorial held for Georgina and Saffie in Mark Square at Tarleton in Lancashire. Around the U.K., thousands gathered to lay flowers and light candles in memory of the victims who were tragically killed by the suicide bombing.

Chief Constable Ian Hopkins of Greater Manchester Police said the explosion occurred around 10:33 p.m. local time near the ticket office outside the arena. Police believe the suspect, who is dead, is Salman Abedi, 22, said Hopkins, though he has not been formally identified by the coroner.

In addition to Abedi, greater Manchester Police said they have arrested a 23-year-old man in connection with the incident, according to the Associated Press.

This article orignally appeared on PEOPLE.