Hong Kong has announced it will prohibit the operation of all Boeing Max aircraft from 6 p.m. Wednesday, local time.

“The temporary prohibition is solely a precautionary measure to ensure aviation safety and protect the public,” a spokesman for the city’s Civil Aviation Department said in a statement.

The city is a major hub for international flights, further complicating Boeing’s growing international problems around the Max 8 model.

Shortly after Hong Kong’s announcement, Lebanon’s Civil Aviation Authority joined in banning Boeing Max planes from its airspace.