Iran’s Foreign Minister Ali-Akbar Salehi said Sunday that the foreign intervention in the regional issues is "not acceptable.”Salehi made the remarks in the opening ceremony of the expert- level meeting of the 16th Non-aligned Movement (NAM) summit in Tehran on Sunday.Salehi said that the Palestinian issue, as the most important problem in the region, should be taken seriously during the ongoing NAM meeting and the "criminal measures of Israeli regime, as the biggest threat to the region” must be taken into consideration.Iran insists on the return of the Palestinians to their " occupied” lands in order to be able to democratically decide on their own fate, he added.The Iranian foreign minister called for the active role of the NAM in annihilation of the weapons of mass destruction (WMDs).Israel also should be forced to respect the non-proliferation of WMDs, said Salehi.Israel’s refusal to sign Nuclear Non-Proliferation Treaty (NPT) is a hurdle to the globalization of non-proliferation of nuclear weapons, he added.Drawing on Iran’s nuclear programme, he said that unilateral sanctions on the countries contradicts UN’s charter and the NAM is opposed to such unilateral sanctions.The Islamic republic is under the expansive Western sanction pressures over its controversial nuclear programme.