Hamas' interior minister, Said Siam, who was responsible for thousands of security personnel in the Gaza Strip, was killed by an Israeli strike on Thursday. Some of Siam's relatives were also casualties of the airstrike, which targeted a home in Gaza City. Earlier in the day, Israel faced criticism from UN General Secretary Ban Ki-Moon after shelling the main UN aid compound in Gaza and injuring three workers. The attack came days after an Israeli tank shelled a UN school, killing dozens. According to Ki-Moon, Israel's Defense Minister Ehud Barak apologized for the attack on the aid compound, which he called a "grave mistake."