Qatar denied the accusations and said that no retaliatory measures would be taken.
African Union chairperson Alpha Conde on Sunday put himself forward as a mediator in the crisis between Qatar and other Gulf countries, urging dialogue after several African nations also recalled their ambassadors to Doha.
The long-simmering dispute took on new proportions after Qatar's ruling emir, Tamim bin Hamad Al Thani, was quoted in the country's state news agency praising Israel and Iran, two of Saudi Arabia's biggest adversaries.
Saudi Arabia said on Sunday it was ordering "suitable measures" to help families with mixed citizenships, but provided few details. "Qatar's National Human Rights Committee has also said the Saudi-led move went far beyond a simple diplomatic dispute and will break up families and disrupt young people's education". "Qatar Petroleum.is conducting business as usual throughout all its upstream, midstream and downstream businesses and operations, and in all activities across all of QP´s world-class facilities", a statement read.
Iran Air spokesman Shahrokh Noushabadi said five aircraft carrying around 90 tonnes of vegetables each had been sent to Qatar in recent days.
Iran also announced it had sent tonnes of vegetables to Qatar, which has seen food imports threatened after its neighbors cut air, sea and land links with the country.
During a media talk in Kazakhstan recently, Sharif had asserted that Pakistan enjoys cordial relations with Saudi Arabia, Iran and Qatar, and will do its best to ease out the tension between the Arab countries.
The crisis has raised deep concerns of instability in the region and on Sunday Kuwait's foreign minister said his country would continue efforts to mediate a solution to the crisis. "I hope so", UAE minister of state for foreign affairs Anwar Gargash wrote on Twitter in reaction to Kuwait saying Qatar was ready to listen to the grievances.
Last week, Saudi Arabia, along with Egypt, Bahrain and UAE, had severed ties with Qatar alleging that it supports terrorism and maintains with Iran. The FIFA President, Gianni Infantino, said he was confident the "region will return to a normal situation" and the current crisis would not affect the staging of football's World Cup in Qatar in 2022.
A man unloads chicken products at Al Meera market in Doha, Qatar, on Friday after people rushed grocery stores in fear of a food shortage.