The delegation included Army Chief Genral Qamar Javed Bajwa, Finance Minister Ishaq Dar, Adviser to the PM on Foreign Affairs Sartaj Aziz and some other top officials.
Qatar has called those charges baseless.
Qatar's Foreign Ministry also announced that the decisions to cut diplomatic ties were unjustified and based on false claims and assumptions.
Three Iranian ports of Bushehr, Bandar Abbas, and Bandar Lengeh are now ready to be used for the dispatch of Iranian products to Qatar, Noorani went on to say.
"The Gulf country hosted the Taliban by request of the U.S. government and as part of Qatar's open-door policy, to facilitate talks, to mediate and to bring peace", said foreign minister's special envoy on counterterrorism Mutlaq-Al-Qahtani.
Qatar Airways struck a defiant tone and vowed to continue expanding, even as its state owner gets punished by neighboring countries in an escalating political standoff that's threatening to choke the tiny nation's economy.
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Saudi Arabia has closed Qatar's only land border, and Iran, as the closest country to Qatar, can export food products to the Arab country through a 12-hour shipping lane, he added.
Oman is a member of the Gulf Cooperation Council but takes a relatively independent diplomatic approach from the other five states in the bloc, especially on relations with Iran, a sticking point in the dispute with Qatar.
In Paris, Sheikh Mohammed, who is on a European tour to drum up support for Qatar, said his country had no idea what had provoked the move against it.
PM Nawaz Sharif with Saudi Arabia's King Salman.
ICCI President Khalid Iqbal Malik said that the whole Muslim Umma was disturbed over the brewing tensions in the Gulf region involving the Kingdom of Saudi Arabia and Qatar.
Qatar's new and state-of-the-art Hamad International Airport in Doha serves as a major transit hub for some 37 million passengers a year, largely between Europe and Asia.
In addition to closing their airspace to Qatar Airways, Saudi Arabia, UAE and Bahrain have also shut down the airline's offices.
Meanwhile, Iran's state-run IRNA news agency has said two Iranian navy vessels will stop off in Oman soon as part of an anti-piracy patrol.
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