Saudi Arabia, Pakistan and Turkey signed a mutual defence agreement on Friday, pledging that any act of aggression against one of them would be treated as an attack on all three. The pact, called the Mecca Agreement on Joint Defense, does not specify what military action the countries would take in each other's defence. The agreement drew mixed reactions. Iranian lawmaker Ebrahim Rezaei dismissed it as a paper agreement that would not bring Saudi Arabia security, saying Riyadh should instead change its policies. The Organisation of Islamic Cooperation welcomed the pact, with its secretary-general saying it supports security and stability in the region and across the Muslim world. Qatar's former prime minister, Hamad bin Jassim bin Jaber Al Thani, also welcomed it as an important agreement and a step that calls for optimism.