PHILADELPHIA (CBS) – A man was taken to the hospital after being shot by a Philadelphia cop early Tuesday morning.

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The incident happened at 6th Street and Glenwood Avenue in North Philadelphia.

Police have not released many details, but a source tells CBS Philly that officers approached a man on the sidewalk who was reportedly acting suspiciously. At some point during the interaction, an officer was forced to open fire on the suspect.

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The suspect was taken to Temple University Hospital to undergo surgery for a gunshot wound to his stomach.

There were no reports of injuries to officers.

Sources say police did not recover a weapon, only a set of keys.

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The incident remains under police investigation.