Worried about depressed friend

A very close long-distance friend of mine has been suffering with depression for the past month, and today at 6:00 am he posted a status indicating he felt suicidal. I know he often feels that way on some level, but this time he went into more detail about it and how he feels, saying he thinks everything is hopeless and wondering why anyone cares about him.

Ive reached out to him (we havent been talking much lately due to said depression) and, along with sending him a picture of a cat (his favourite animal and nickname for me), I told him that I didnt want him to die, that I would stick with him through everything, and that I know his life has so much worth even if he cant see it, etc. I also sent him a song I think hed like, that helps me when I get anxious.

Im very worried about him. Hes felt like this before and its never come to anything, but I know its always something to take seriously. As of typing this, he hadnt been online since.

Is there anything else I can do? He lives in a different country so I cant just go over and see him, as much as Id like to. I know Im going to be thinking about him all day, wondering if hes alright.