CAIRO, Feb 10 (Aswat Masriya) - Egypt's East Cairo Prosecution ordered early Tuesday the detention of 21 individuals arrested in the deadly violence which erupted ahead of a football game on Sunday, leaving 19 killed.

The detainees are accused of attacking security personnel, vandalising police cars and public facilities, blocking the road and "inciting terror and panic among passersby," said Mohamed Seif, the head of the prosecution.

All detainees denied the charges, Seif said. They said they headed to the stadium with tickets to attend the game, yet were surprised caught up in the crowd and a stampede before being arrested as they tried to leave the scene of events.

According to the ministry of interior, large numbers of Zamalek fans attempted to storm the stadium. The ministry added that security forces responded by trying to prevent assaults on stadium facilities.

Prosecutor General Hisham Barakat reiterated the same version of events in a statement released by his office late Sunday, accusing the football fans of blocking a road and torching two police cars.

Meanwhile, "Ultras White Knights" group, which supports the Zamalek Sporting Club, said on its Facebook page that the police "initiated firing teargas towards fans" outside the stadium, adding that many people fainted and experienced suffocation as a result.

Mohamed al-Samahi, a member of the team investigating the violence, said that the public prosecution issued arrest orders to a number of Ultras White Knights leaders, accusing them of "inciting the violence" which preceded the game.

A preliminary medical report by Egypt's Forensic Authority suggested on Monday that the 19 people killed died due to a stampede. The authority denied that any of the deaths were caused by live ammunition, birdshot or suffocation from teargas.

Sunday's game between Zamalek and Enppi football clubs was eventually played, almost 40 minutes after its scheduled start time. 

The Interior Ministry allowed football fans to attend the Egyptian Premier League games towards the end of 2014. The games were held in the absence of any fans since over 70 football fans were killed in the Port Said Stadium following a game in February 2012.

This is the first football game for Zamalek club where football fans were allowed to attend since February 2012.

Tensions often arise between Ultras groups and security forces securing games.