Though now they are identifying a man from Kyrgyzstan as the suspect. Sounds like the man named from Kazakhstan was a victim (he's not mentioned here but I saw his name in another article that I've since closed).
http://abcnews.go.com/International...-suspect-subway-bomb-attack/story?id=46561461
http://abcnews.go.com/International...-suspect-subway-bomb-attack/story?id=46561461