A third Kassam rocket was fired from the Gaza Strip on Thursday evening and landed in an open area in the Shaar Hanegev regional council.No injuries or damage were reported.RELATED:'Kassams an obstacle to peace'Kassam damages building in NegevShaar Hanegev regional council spokeswoman said that loud explosions were heard in the area after the firing, Channel 10 news reported. The color red alert system was activated as a result of the launch.Earlier Thursday a Kassam rocket was fired at the Sdot Negev regional council and also landed in an open area. No injuries or damage was reported.Thursday's rocket attacks comes after a mortar shell landed near several childrens' school buildings on Wednesday in a Sha'ar Hanegev regional council kibbutz, some 30 minutes prior to the students' scheduled arrival.One of the buildings sustained light damage, and no injuries were reported. The school building impacted by the mortar was reinforced only at the roof and not at the side walls, like other protected buildings in the area. Security officials decided to let school continue as usual.