UNITED NATIONS - The UN Security Council, reacting to a request from the Iranian ambassador on Tuesday, condemned in the strongest terms a weekend terrorist attack that killed nearly 57 people in Iran, six of them commanders in the Iranian Revolutionary Guards. The statement condemning the attack was issued by a 15-member council in response to a letter from Ambassador Mohammad Khazaee, who demanded that it take a stand on the bombing, which the Revolutionary Guards chief said was carried out by a group linked to the US and Britain. The council called on all states to cooperate actively with the Iranian authorities in bringing the perpetrators to justice. The members of the Security Council condemned in the strongest terms the deadly terrorist attacks that occurred in the border city of Pish in Iran on October 18, 2009, said the statement, which was read out to reporters by Vietnamese Ambassador Le Luong Minh, currently president of the council. The council underlined the need to bring perpetrators, organizers, financiers and sponsors of this reprehensible act of terrorism to justice. It urged all countries to cooperate actively with the Iranian authorities in this regard. Iran has said the insurgent group Jundollah claimed responsibility for Sundays bombing in Sistan-Baluchestan province. Revolutionary Guards commander-in-chief Mohammad Ali Jafari on Monday accused the United States, Britain and Pakistan of sharing responsibility for the bomb attack. He was quoted by Irans ISNA news agency as saying that Iranian security officials had documents indicating Jundollah had direct ties to US, British and Pakistani intelligence. In Islamabad, Foreign Minister Shah Mehmood Qureshi on Wednesday pledged Pakistans support for Iran in tracking down those responsible for the suicide bombing, Khazaee, the Iranian ambassador, did not point any fingers in his letter to the Security Council, but said, There are indications that the group enjoys the support of some foreign countries. Britain and the United States have condemned the attack. A US State Department spokesman rejected the reports of US involvement in the attack as completely false. On Monday, Secretary-General Ban Ki-moon issued a strong condemnation of the attack. The Security Councils statement, which was unanimously approved, added, The members of the Security Council reaffirmed the need to combat by all means, in accordance with the Charter of the United Nations, threats to international peace and security caused by terrorist acts. It expressed its condolences to the families of the victims, as well as to the people and the government of Iran.