The Great Gatsby, curious glances

Could you please tell me if the word "curious" in the following excerpt from The Great Gatsby means "inquisitive", "indiscreet" or "strange", "odd"?

So naturally Michaelis tried to find out what had happened, but Wilson wouldn’t say a word—instead he began to throw curious, suspicious glances at his visitor and ask him what he’d been doing at certain times on certain days.

Thank you.