At least 40 people were today killed in clashes in the Central African Republic, the day after the signing of a ceasefire deal. <br/><br/>Aid and security sources said the violence in the central town of Bria was between members of Christian anti-balaka militias and ex-Seleka fighters. <br/><br/>Aaccording to medical charity Doctors Without Borders (MSF) in addition, 43 people were injured.<br/><br/>The violence erupted just a day after the CAR government and rebel groups agreed to an immediate ceasefire, a deal brokered by the Catholic community Sant'Egidio in five days of negotiations in Rome. <br/><br/>Under the agreement, armed groups were granted political representation in exchange for an end to attacks and blockades.<br/><br/>According to several sources, sporadic fighting has continued since Saturday between Christian 'anti-balaka' militias and the FPRC after its leader Hamad Issa was killed in the town.<br/><br/>UN special representative on CAR, Parfait Onanga-Anyanga said, we know that much remains to be done. <br/><br/>It is vital that the ceasefire agreed to by the parties is carried out immediately.