For the first time since the beginning of the Israeli military operation in the Gaza Strip, there was also a rocket alarm in Jerusalem on Sunday. According to military reports, warning sirens were sounding around the city in the morning. Residents reported explosions. Since Friday, more than 400 rockets have been fired at Israel from the Gaza Strip, according to the military. There had been fears that the situation could escalate further on Sunday, the Jewish day of fasting and mourning, Tisha B’Av. Religious Jews mourn the destruction of the two ancient temples in Jerusalem on this day. The I…