NU'EST's Baekho updated his fans via Instagram with a rather lengthy and somber message in regards to his father.�

On April 8, Baekho posted up a picture message where he wrote, "Hello this is Baekho. I'm sorry for announcing such unpleasant news all of a sudden. Today at midnight, my father's nose wouldn't stop bleeding�so�he went to the hospital. There, he was diagnosed with acute leukemia and they said that he needed blood donor cards as soon as possible.�

I apologize for asking you guys for such things, but if you have blood donor cards, send it to 44-20 Samseong-dong, Gangnam-gu, Seoul, South Korea�(Baekho Blood donor card). I apologize again for such unpleasant news. Thank you."�

We send our best wishes to Baekho's father.

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A photo posted by BAEKHO (@realbaekho) on Apr 8, 2015 at 5:08am PDT