[It's a little surprising to find a stranger as concerned about his brother as Thor is, but he replies soberly, anyway.]

I can only hope not. I was transporting him back to Asgard after he brought war to Midgard, when I was separated from him and deposited here. With any luck, he returned safely without me.

And yes, the bifrost was destroyed.

[He sighs.]

It was the only way to save Jotunheim. Loki tried to destroy it by focusing the full power of the bifrost upon it, and it was too late to close the portal. I had to break it.