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A firefighter and nurse were recovering Wednesday from stab wounds caused by a patient in a Boyle Heights emergency room the night before, officials said.

The stabbing occurred at White Memorial Medical Center, located at 1720 East Cesar E. Chavez Ave., around 9:30 p.m. Tuesday, Los Angeles Police Department Mike Lopez said.

The on-duty Los Angeles Fire Department firefighter was assisting someone when a patient pulled a knife from his sock and stabbed the two victims.

The firefighter was stabbed in his left arm, and the nurse was stabbed in his shoulder. Both were in stable condition following the attack, LAPD Lt. Jose Martinez said.

Firefighters initially said two hospital staff members were attacked, but Martinez later clarified that the firefighter and nurse were the only victims.

An unidentified person was detained following the attack. He were expected to be booked on suspicion of attempted murder, Lopez said.