Hong Kong's flagship carrier, Cathay Pacific, has warned staff they risk being sacked if they join the pro-democracy protests.
In an internal memo to staff, Cathay director Tom Owen said participating in the strike "may lead to termination of contract".
Hong Kong's flagship carrier, which has 27,000 staff in the city, has already fired at least four staff - including two pilots - for supporting the protests.
The carrier recently revised its code of conduct to reiterate its "zero tolerance" approach to staff participating in "illegal protests".
Meanwhile, pro-democracy activists Joshua Wong, Andy Chan and Agnes Chow have been detained on suspicion of organising illegal protests.
This comes as police refused permission for a pro-democracy march on Saturday.
Qatar's prime minister said on Sunday that efforts to reach a new ceasefire in Gaza have made some progress but an agreement between Israel and Hamas to end the war remains elusive.
A huge blast most likely caused by the explosion of chemical materials killed at least 18 people and injured more than 700 on Saturday at Iran's biggest port, Bandar Abbas, Iranian state media reported.
The UN Refugee Agency (UNHCR) and the UN Office for the Coordination of Humanitarian Affairs (OCHA) have sounded the alarm over severe funding shortfalls that are hindering life-saving humanitarian aid in countries including Nigeria, Burundi, and Colombia.
A number of people were killed and multiple others were injured in Vancouver after a vehicle drove into a crowd at a Filipino street festival in the western Canadian city, police said on Saturday.