Opposition leader Shaul Mofaz responded to the rockets fired on Sunday morning into the Negev during a visit to the Barzilai Hospital in Ashkelon.Mofaz directed his comments towards Hamas, saying: "I will pass a message on to the heads of Hamas - the blood is on your hands if you touch a hair on our children's heads."He continued: "The academic year will open as usual. It is our duty to ensure that the children in the south have the security they need."Earlier on Sunday, Palestinians in Gaza fired three rockets into the Sha'ar HaNegev Regional Council.One of the projectiles landed in Sderot's industrial area, falling just outside a factory, and one hit one of the buildings, causing some damage. The third rocket has not been found, Israel radio reported. One person was lightly injured and another suffered from shock.The Color Red alert was sounded across the area shortly before the rockets landed. During his visit, Mofaz also received an overview of the security measures in the Ashkelon hospital, and said that the delay in implementing proper security measures is "a serious failure in defense."