JERUSALEM/GAZA—Hamas terrorists in the Gaza Strip fired rockets toward the Jerusalem area and southern Israel on Monday, carrying out a threat to punish Israel for violent confrontations with Palestinians in Jerusalem. The Gaza health ministry said nine Palestinians, including three children, were killed “in a series of strikes in northern Gaza.” It did not explicitly blame Israel for the deaths, in an area that has been a staging ground for Hamas cross-border rocket attacks. Rocket sirens sounded in Jerusalem, in nearby towns and in communities near Gaza minutes after the expiry of an ultimatum from the enclave’s ruling Hamas terrorist group demanding Israel stand down forces in the al Aqsa mosque compound and another flashpoint in the city. As Israel celebrated “Jerusalem Day” earlier on Monday, marking its capture of eastern sections of the city in the 1967 Arab-Israeli war, violence erupted at the mosque, Islam’s third most sacred site. …