A Philadelphia hospital worker shot and killed his coworker inside the hospital and injured 2 police officers

• A Jefferson Hospital employee shot and killed a coworker inside the hospital early Monday, NBC 10 News reported.
• The suspect then shot and injured two police officers in West Philadelphia's Parkside neighborhood.
• Four other officers fired at the suspect, who is in critical condition but expected to recover.

An employee at Jefferson Hospital in Philadelphia shot and killed his coworker inside the hospital and then injured two police officers early Monday, local NBC affiliate NBC 10 News Philadelphia reported.

The victim was a 43-year-old nursing assistant at the hospital, police said. His name has not been released.

"We do believe that the other employee was targeted," Police Commissioner Danielle Outlaw said at a news conference Monday. "The reasons why, at this point, we still don't know and are unclear."

The suspect fled the hospital in a U-Haul truck after the shooting. About an hour later, a citizen notified police of a man in scrubs with a gun in West Philadelphia's Parkside neighborhood, NBC 10 News reported.

When police arrived at the scene, the suspect fired and shot two of the officers. Four officers fired back, hitting the suspect in his upper body and neck, according to police.

The 55-year-old shooter is in critical condition but is expected to make a full recovery, according to NBC 10 News.

This story is developing. Please check back for updates.