The Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei has extended condolences for the death of dozens of people in a Sunday terrorist attack in southeastern Iran, Press TV reported.
At least 42 people, including senior commanders from the Islamic Revolution Guards Corps (IRGC), Nour-Ali Shoushtari and Rajab-Ali Mohammadzadeh, were killed in a Sunday morning bombing during a gathering of Shia and Sunni tribal leaders in the borderline region of Pishin.
In a Monday statement, Ayatollah Seyyed Ali Khamenei offered his condolences to the families of those killed in the attack and said, "The enemies should know that such animosities ... can not stain the unity of religions and tribes."
"Those who violate the lives and security of the people will be punished for their treacherous deeds," the Leader said.
The Sunday attack was carried out by the Pakistan-based Jundullah separatist group, which is led by Abdolmalik Rigi.
The head of the IRGC said on Monday that an Iranian delegation would head for Pakistan to present 'proof' of US, Britain and Pakistan's involvement in the attack.
"Our security bodies have found evidence that proves the Rigi group is supported by American and British intelligence services and unfortunately the Pakistani intelligence service," said General Mohammad-Ali Jafari.
"He [Rigi] undoubtedly acts under their orders," he said, adding that the Iranian delegation would ask for Rigi to be handed over.
Britain, Pakistan and the US have all condemned the terrorist attack and denied any involvement in the bombing in which dozens were also injured.
Iranian President Mahmoud Ahmadinejad, in a telephone conversation with his Pakistani counterpart Asif Ali Zardari, said the presence of terrorist elements in Pakistan was 'unjustifiable' and urged Islamabad to 'quickly confront' Jundullah terrorists.
The ring is behind a torrent of bombings and terrorist attacks in Iran.