At least four people have been killed in a powerful explosion that rocked a Christian neighborhood in the Syrian capital, Damascus, Syria’s state - run TV reports.On Thursday, a terrorist bomber set off an explosion outside one of the main churches in the predominantly Christian neighborhood of Bab Touma in central Damascus. Four people have so far been reported dead, but the number of fatalities is likely to rise. On June 23, at least five people, including civilians and police officers, lost their lives after foreign - backed militants attacked two security compounds in Damascus. Anti - Syria Takfiri extremists have been behind many of the deadly bombings targeting both civilians and government institutions across the Arab state since the outbreak of the violence. Turmoil has gripped Syria for over two years, and many people, including large numbers of Syrian soldiers and security personnel, have been killed in the foreign - sponsored militancy. On June 22, foreign ministers of the countries supporting the extremists in Syria, including Egypt, France, Germany, Italy, Jordan, Qatar, Saudi Arabia, Turkey, the United Arab Emirates and the United States, agreed to provide them with more weapons. TheWall Street Journal reported on Wednesday that the US spy agency CIA has begun transferring weapons to Jordan in an attempt to arm Takfiri militants fighting against the Syrian government.