London, May 23 (RHC-Xinhua)-- At least 22 people were killed and 59 more injured in a blast that occurred outside a concert hall in the northern English city of Manchester.  Shortly after the explosion, the Islamic State group claimed responsibility for the fatal attack. 

British police reportedly arrested one suspect connected to the attack at the Manchester Arena, where U.S. singer Ariana Grande had just finished a performance. 

British Transport police said one explosion was reported to have hit the foyer of the building at about 10:30 p.m. local time.  Multiple witnesses said they heard an explosion, with one telling the Guardian the blast shook the building. 

British Prime Minister Theresa May said in a statement that authorities were working to establish the full details of the deadly attack.