CAIRO — A riot broke out Sunday night outside of a major soccer game in Egypt, with a stampede and fighting between police and fans killing at least 25 people, authorities said.The riot, only three years after similar violence killed 74 people, began ahead of a match between Egyptian Premier League clubs Zamalek and ENPPI at Air Defense Stadium east of Cairo. Such attacks in the past have sparked days of protests pitting the country’s hard-core fans against police officers in a nation already on edge after years of revolt and turmoil.Two security officials, speaking on condition of anonymity, said at least 25 people were killed.The violence comes as police face increasing scrutiny following the shooting death of a female protester in Cairo and the arrest of protesters under a law heavily restricting demonstrations. President Abdel-Fattah el-Sissi has pledged to bring stability to Egypt amid bombings and attacks by Islamic militants, but also has said Egypt’s emergency situation meant that some violations of human rights were inevitable, if regrettable.Egypt’s public prosecutor issued a statement ordering an investigation. After convening an emergency meeting to discuss the violence, the Cabinet announced that it was postponing upcoming soccer matches until further notice, Egypt’s state television said.What caused the violence wasn’t immediately clear. Security officials said Zamalek fans tried to force their way into the match without tickets, sparking clashes. Fans have only recently been allowed back at matches and the Interior Ministry planned to let only 10,000 fans into the stadium, which has a capacity of about 30,000, the officials said.