On Saturday night, two people were killed and at least 13 injured after a shooting incident in Philadelphia, according to The Philadelphia Inquirer.
The Philadelphia Police Department responded to reports of a person with a firearm in the crowd.
Police said that an officer arrived at the scene and saw a man shooting into the downtown crowd and fired his weapon toward the shooter.
The alleged suspect sustained a gunshot wound, but it was not confirmed whether that person was shot by the police officer.
No police officers were injured.
Earlier, US President Joe Biden delivered a speech in which he called on Congress to move forward measures such as red-flag laws and a ban on so-called "assault weapons". Biden's speech came a day after a mass shooting in Tulsa, Oklahoma, a school massacre in Texas on 24 May, and a mass shooting in Buffalo on 14 May.