Hundreds of Egypt's Zamalek FC fans, known as Ultras ‘White Knights', gathered Monday at Fustat Park in Misr Al Qadima district, to commemorate lives of their colleagues who died during air defense stadium incident in February 2015. White Knights have called for a protest to commemorate the first anniversary of the air defense stadium incident, which claimed the lives of 20 Ultras members, Al Bawaba News reported. The park witnessed high security presence and tough security measures to deal with any riots or violence that may occur during the protest.