By Nidal al-Mughrabi CAIRO, June 20 (Reuters) - Israeli strikes and gunfire killed at least ninepeople, including a child, in the Gaza Strip on Saturday, health officials said. An Israeli airstrike killed four Palestinians, including two women and a child, in an apartment building in Gaza City, health officials said. The attack on the building in the Sabra neighborhood of Gaza City destroyed the apartment and wounded several other people, medics added.