Children were among the victims in what has been described as the country's worst football tragedy, with some witnesses confirming that many fans did not have tickets for the match yesterday.
"It was a serious error to allow so many people get so close to the stadium. Many people didn't have a ticket and that created confusion," Angolan President Eduardo dos Santos said.
Several witnesses accused the police of having provoked panic by attempting to disperse a crowd outside the ground on Friday with tear gas.
"It was badly organised. They threw tear gas which provoked the crowd," he added.
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The government has set up a commission to probe the crush, the national Angop news agency reported.
"Several children have been killed," police spokesman Orlando Bernardo told AFP.
"There was a blockage at the entrance to the January 4 stadium," he said.
"This obstruction caused multiple fatalities -- 17 deaths, and there are 56 injured in the hospital."
A second commission will help families of those who died and assist in organising funerals.
The players went on to complete the match, a 1-0 win for Recreativo, despite the tragedy.
A doctor at the military hospital in Uige said Saturday that the toll had risen to 25, but officials maintained that the toll was 17.
Police said hundreds of fans had tried to enter the already packed stadium to see the match, causing a crush that pushed some people to the ground.