Anti-government protests were planned in different locations in the Asian financial hub, including one at the city's international airport for a third day.
The broadside poses a major commercial challenge to Cathay, which already reported tumbling bookings last week as a result of the anti-government protests gripping Hong Kong.
Increasingly violent protests have plunged Hong Kong into its most serious political crisis for decades, posing a serious challenge to the central government in Beijing.
US President Donald Trump has condemned hatred and white supremacy in a public address following the mass shootings in Texas and Ohio late on Saturday.
A total of 46 countries including US and China signed the Singapore Convention on Mediation Wednesday, also called the United Nations (UN) Convention on International Settlement Agreements Resulting from Mediation