Nancy Kerrigan's Brother Finally Posts Bail

Nancy Kerrigan's brother Mark -- who has been locked up since he allegedly assaulted his father last month -- just posted bail moments ago.

Court officials in Woburn, Massachusetts tell TMZ Mark -- who faces one charge of assault and battery on an elder with serious bodily injury -- was released from the local detention center after posting his $10,000 bail.

Mark will now be allowed to live at his mother's house -- under house arrest -- and must wear a GPS device and submit to drug and alcohol testing.

Mark's father, Daniel, died shortly after their alleged altercation on January 24.

A rep for the family said they were "delighted" to have Mark back home.