The bombing targeted 49-year-old Nizar Rayan, ranked among Hamas' top five decision-makers in Gaza. His four-story apartment building crashed to the ground, sending a thick plume of smoke into the air and heavily damaging neighboring buildings. It killed Rayan and 11 others, including two of his four wives and four of his 12 children, Palestinian health officials said. The Muslim faith allows men to have up to four wives.
http://news.yahoo.com/s/ap/20090101/ap_on_re_mi_ea/ml_israel_palestinians
Hamas leaders went into hiding before Israel launched the offensive on Saturday, but Rayan was known for openly defying Israel, and the military said he had a tunnel under his house that could serve as an escape route.