(AP) - A health official in Gaza says the number of Palestinians killed since the Israeli offensive began on Wednesday has reached 100, about half of them civilians, with hundreds more wounded. Israel is broadening its targets, hitting crowded areas in the Gaza Strip Monday and killing a senior militant with a missile strike on a media center. It's the second strike on the building in two days. The Hamas TV station, Al Aqsa, is located on the top floor. Israeli aircraft have struck several crowded areas in the Gaza Strip, devastating several homes belonging to one clan as Israel broadened its targets in the 6-day-old offensive. Hamas fighters also have fired hundreds of rockets into Israel in the current round of fighting, including 75 on Monday, one that hit an empty school.