The war of words between the two countries stems back to a series of tweets from Canada's Foreign Ministry last week, when Ottawa expressed concern over arrested civil society activists in Saudi Arabia.
Riyadh called the move a violation of its sovereignty and sought to impose a string of diplomatic sanctions against the North American country. In a tweet posted Friday, Canadian officials urged Riyadh to "immediately release" women's rights activists Samar Badawi and Nassima al-Sadah. Both campaigners were arrested in Saudi Arabia in late July, according to Human Rights Watch.
Saudi Arabia's Foreign Ministry took exception to Canada's online plea, calling it a "grave and unacceptable violation of the kingdom's laws and procedures."