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By Bernd Debusmann Jr
BBC News, Washington
Two men have been charged with murder for last week's deadly shooting at a Super Bowl victory parade in Kansas City, prosecutors said.
A woman died and 22 others were injured during the shooting, which police said stemmed from the two men arguing.
The charged men - identified as Dominic Miller and Lyndell Mays - were both shot and wounded during the incident.
Two others, teenagers, were charged with gun and resisting arrest violations last week.
Prosecutor Jean Peters Baker of Jackson County said at a press conference on Tuesday that the two adult men - Mr Miller and Mr Mays - had been charged with second-degree murder, two counts of armed criminal action and unlawful use of a weapon.
Mr Mays was the one who got into an argument at the event and drew a handgun, Ms Peters Baker alleged.
Other people in attendance then also drew guns during the incident, officials said. That included Mr Miller who prosecutors believe is the one who shot and killed Lisa Lopez Glavan, 43, during the incident.
Both men were charged with murder on Tuesday, however. They are being held on a $1m (£792,000) bond.
Their charges are in addition to the two teenagers who were charged last week.
"These are adults," Ms Peters Baker said, clarifying confusion about the new charges. "There are two juveniles that has been reported already pretty broadly by the news media. Those are being handled by a different office at this point in time."
The investigation into the shooting remains ongoing. Ms Peters Baker said that further charges may still follow.
"We seek to hold every shooter accountable for their actions on that day - every single one," she said. "So while we're not there yet on every single individual, we're going to get there."
The 22 people wounded in the incident ranged in age from eight to 47, according to Kansas City police.
The shooting was one of several to take place at sports celebrations across the US in recent memory.
In June last year, a shooting at a celebration for the Denver Nuggets NBA team left 10 people wounded, including one of two people charged in relation to the incident.
This is a developing story.