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Johannesburg – The lives of four people severely injured in a grenade attack, which killed seven people and injured 20 others at a peace concert in the Central African Republic’s (CAR) capital Bangui, are hanging in the balance, Reuters reports.

Reuters reported late Sunday that two people on a motorbike attacked revellers who were attending a Saturday night concert organised to foster reconciliation and social cohesion by throwing a grenade into the crowd.

Bangui has been the focal point of inter-religious violence between Muslims and Christians following violence that erupted in 2013 in the impoverished and landlocked country.

Following the attack heavy retaliatory gunfire erupted in Bangui’s PK5 neighbourhood which is a Muslim enclave in the majority Christian city.

Three motorcycle taxi riders were killed in retaliation for the concert attack.

Muslim residents of the PK5 neighbourhood subsequently set up roadblocks into the neighbourhood to prevent further infiltration by those seeking further revenge while reports of sporadic gunfire continued to filter through.

Security in the CAR has worsened over the five-year period of conflict and has been accompanied by waves of ethnic cleansing, particularly in the east.

The United Nations’ 12 000-strong peacekeeping mission is located in the capital which had been relatively stable until the weekend violence.