The man broke into the couple's home and beat them with a metal object, without giving a motive for the killing.
The figures given by more than 30 governments around the world show that at least 2,097 foreign pilgrims died.
Foreign Minister Adel Al Jubeir says president Assad had to leave power if peace was to be achieved.
"They are the ones who started this, and they are the ones who continue this," he told a joint news conference with his French counterpart Laurent Fabius.
The Organisation for Grain Silos and Flour Mills has awarded the fourth batch of imported wheat for the year, amounting to 740,000 tons, and supplies will come from European, American (North and South), Australian and Canadian origins.
"The Russian intervention in Syria will engage them in a sectarian war," the Saudi source said on Monday, adding that the kingdom "warns of the dangerous consequences of the Russian intervention".
Saudi Prince Turki Al Faisal on Sunday rejected the idea of sharing the administration of the annual Haj pilgrimage with other Muslim nations, saying Riyadh considers it "a matter of sovereignty" and a "privilege."