Angry protests mount in Egypt An Egyptian protester holds a national flag in front of security forces in downtown Egypt, on February 3, 2012. CAIRO, Feb. 3 (UPI) -- Thousands of angry Egyptians gathered Friday outside the Interior Ministry in Cairo in continuing protests stemming from a deadly stampede at a soccer match. At least four people were reported killed Thursday and Friday in clashes between demonstrators and police, CNN reported. Protesters in Cairo waved al-Ahly soccer club flags. The violence Wednesday in Port Said began when fans of al-Masry, the local team, stormed the field. "The people demand the downfall of the field marshal," protesters called. Thousands of injuries have been reported. A government spokesman said protesters stormed a building in Cairo and were using the roof to fire pellets and throw Molotov cocktails, killing at least one person. In Suez, a health official said police shot and killed two people Thursday and wounded 15 others after 3,000 demonstrators protested in front of police headquarters, the British newspaper The Guardian reported Friday, while officials said a soldier died after being run over by a truck. Protesters Friday in Cairo held their ground outside the Interior Ministry building, al-Ahram Online reported. Interior Ministry officials said Cairo demonstrators tore down the cement and barbed-wire barricades built recently to protect the ministry's vast security headquarters. Many demonstrators accused supporters of Mubarak, whose sons Gamal and Alaa had close ties to Egypt's soccer establishment, of instigating the Wednesday violence at the Port Said stadium. Diehard Ahly fans, known as "ultras," played a key role in anti-Mubarak protests during the early days of the Egyptian revolution, helping beat back a group of mercenaries, some on horseback and camels, who attacked protesters in Cairo's Tahrir Square a year ago. In a move many activists point to as proof of an orchestrated police conspiracy, guards cut the stadium lights just as the violence began and then closed the stadium's exit gates, trapping escaping fans, witnesses told The Wall Street Journal.