Lahore bombing

I had not heard of the group Jamaat-ul-Ahrar, which claimed responsibility for the suicide bombing in Lahore that killed at least 65 people (evidently mostly Christians, who were intentionally targeted).  Wiki says that the group split from the main Pakistani Taliban organization (the TTP) in 2014.  It is not entirely clear from the Wiki entry exactly what Jamaat-ul-Ahrar's current relation to the TTP is.

ETA 3/28: According to the NewsHour tonight, most of the victims were Muslims.