The officers were addressed to the Jefferson University Hospital and were reported in stable condition as of late Monday, according to WPVI.
The shooting occurred a little before 10 PM along the Ben Franklin Parkway in Philadelphia, near the Philadelphia Museum of Art, only as the fireworks display was getting began after a music concert celebrating the July 4 holiday had ended.
One of the officers, with the Philadelphia Police Highway Patrol, sustained a graze wound to the head, while the other officer, who was with the Montgomery County Bomb Unit, suffered a gunshot wound to the shoulder, reported WTXF-TV.
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“For those looking to reunite with loved ones on the Parkway, please meet at 1901 Vine Street in front of the Free Library of Philadelphia. All others, please avoid the area,” the Philadelphia Police Department announced on Twitter late Monday after shots were fired that sent crowds scattering.
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Police have not declared what had ignited or triggered the gunfire and no arrests have been reported as of late Monday.
July 4 is a national holiday across the United States that marks when Congress signed the Declaration of Independence in 1776.
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The shooting that injured the two police officers came just hours after a shooting in a Chicago-area suburb that killed six people and wounded at least 24 others. A suspect has been taken into custody.
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Sen. Pat Toomey (R-Pa.) on Twitter thanked law enforcement and wished the two wounded police officers a speedy recovery.
Philadelphia Mayor Jim Kenney said. Police were searching for the shooter.
Video from the incident showed hundreds of people running from the Benjamin Franklin Parkway after shots were fired.
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Kenney announced that his administration was "pleading with lawmakers" to stop the "flow of guns into our city."
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"Our traditions cannot and will not be ruined by the scourge of gun violence," he continued.
The gunfire broke out late on Monday near the Philadelphia Museum of Art on the last day of a festival with many people watching a fireworks show after a concert.
"There is a security incident on the Benjamin Franklin Parkway," emergency authorities announced, referring to the shooting.
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Police directed people in surrounding buildings to shelter in place.
"I didn't hear the shots, but the cops were like, ‘Run, run, run,'" one woman said to an NBC affiliate.
One officer sustained a graze wound to the head and the other a gunshot wound to the right shoulder, according to NBC10.