French President Francois Hollande said on Sunday \"accumulated evidence\" showed the Syrian government was responsible for using chemical weapons against civilians around Damascus. \"The President of the Republic estimated that there was now an accumulated evidence indicated that the attack of 21 August was chemical, and everything led to consider the Syrian regime as responsible for this unspeakable act,\" said a presidency\' s office statement. During a phone talk with the Australian Prime Minister Kevin Rudd, Hollande had called for that UN inspectors have access \"without delay and without restriction\" to carry out an investigation at the sites where the alleged chemical attacks were reported taking place. The French head of state also hold talks with British Prime Minister David Cameron on Syrian crisis and \"agreed to discuss as soon as possible the responses to this intolerable act\" with Cameron. The two European leaders \"unreservedly condemned the use of chemical weapons in Syria,\" and urged \"an immediate and full cooperation\" of Syrian officials with the UN inquiry mission. In a statement of Syria\'s Foreign Ministry released on Sunday, Damascus has agreed to allow the UN chemical investigation team to enter the eastern al-Ghouta countryside of the capital Damascus to probe the alleged use of chemical weapons. The main Syrian opposition group claimed that the Syrian government used chemical weapons on Wednesday and killed as many as 1,300 people. But the Syrian officials denied the accusations.