Egypt football riot: Three days' mourning for dozens killed 
Egypt's ruling Supreme Council of the Armed Forces has announced three days of national mourning after at least 74 people died in clashes between rival football fans in the city of Port Said.
Hundreds more were injured as fans invaded the pitch after a match between top-tier clubs al-Masry and al-Ahly.
Emergency meetings of the cabinet and parliament have been called.
Protest marches are being planned for Thursday against the police's inability to contain the violence.
One al-Ahly fan told the BBC that fans will march from the al-Ahly's club in Cairo to the Interior Ministry.
"People are angry at the regime more than anything else... People are really angry, you could see the rage in their eyes," Mohammed Abdel Hamid said.
Hundreds gathered at Cairo's main railway station to receive the injured arriving from Port Said, with some chanting slogans against military rule.
Field Marshal Hussein Tantawi, the head of Egypt's ruling army council, went to a airbase near Cairo to meet al-Ahly players who were flown back from Port Said on a military aircraft.
"This will not bring Egypt down... These incidents happen anywhere in the world. We will not let those behind it go," he said, according to Associated Press.
It is the biggest disaster in the country's football history, said the Egyptian deputy health minister.
"This is unfortunate and deeply saddening," Hesham Sheiha told state television.
Some of the dead were security officers, the Associated Press news agency quoted a morgue official as saying
The BBC's Jon Leyne in Cairo says it appears some fans had taken knives into the stadium.
Our correspondent says the lack of the usual level of security in the stadium might have contributed to the clashes.
Police in Egypt have been keeping a much lower profile since last year's popular protests that ousted President Hosni Mubarak from power.
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Major football stadium disasters
May 1964: 318 people killed in riots during a Peru-Argentina match at the National Stadium in Lima
June 68: More than 70 people die in a gate stampede after a River Plate-Boca Juniors match in Buenos Aires
Jan 71: 66 people killed in a crush after a Rangers-Celtic derby in Glasgow, Scotland
Feb 74: 49 people trampled to death at a match in Cairo
Oct 82: More than 300 reportedly killed in a stampede on a narrow, icy staircase at a Spartak-Haarlem match in Moscow
May 85: 56 people die in a terrace fire during a Bradford City-Lincoln City match in Bradford, England
May 85: 39 people are killed when a separation wall collapses at a Liverpool-Juventus European Champions Cup final at Heysel Stadium in Brussels
March 88: 93 people die in a stampede after fleeing a hailstorm at the national stadium in Kathmandu, Nepal
Apr 89: 96 people are crushed to death at a Liverpool-Nottingham Forest cup match in Sheffield
Jan 91: At least 40 people die in a stampede after riots at a friendly match in Orkney, South Africa
Oct 96: About 80 people are killed in a stampede before a Guatemala-Costa Rica World Cup qualifying match in Guatemala City
Apr 01: More than 40 people killed in a crush at the overcrowded Ellis Park stadium in Johannesburg, South Africa
In pictures: Egypt football clash
Egyptian fans are notoriously violent, says our correspondent, particularly supporters of al-Ahly known as the Ultras.
They have been heavily implicated in confronting the police during recent political protests, our correspondent adds. There is speculation that the security forces may have had an interest in taking on al-Ahly supporters.
Wednesday's violence broke out at the end of the match, which, unusually, Port Said club al-Masry won 3-1.
Witnesses said the atmosphere had been tense throughout the match - since an al-Ahly fan raised a banner insulting supporters of the home team.
As the match ended, their fans flooded onto the pitch attacking al-Ahly players and fans.
A small group of riot police tried to protect the players, but were overwhelmed.
Part of the stadium was set on fire.
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