SNIPPET: "Police are working to figure out the origin of the rocket that was fired from the Gaza Strip Saturday evening and exploded near Kibbutz Nahal Oz, without causing damage or injures. A total of four rockets and two mortar shells were fired at Israel on Saturday, causing no injuries. An initial examination revealed that the rocket fired at Nahal Oz was manufactured using professional means, most likely outside of the borders of the Gaza Strip. The rocket had a diameter of 115 millimeters, and police sappers were working to locate fragments of it to be tested."