Israeli forces killed three Palestinians during a raid early Thursday in the West Bank city of Jenin and left another wounded.
According to the official Palestinian news agency WAFA, Palestinian security forces put up resistance to the Israeli troops.
At least three people, including two from a Palestinian security unit, lost their lives.
Lt. Ethem Aleyvi (23) and Cpt. Taysir Isa (33) worked for the military intelligence service, and Cemil Mahmud al-Amuri was a Palestinian who had previously served time in Israeli prison, the agency reported.
The injured Palestinian, also from the security unit, was taken to the hospital for treatment.
Col. Talib Salahat, the director of the military intelligence service, said Aleyvi and Isa were killed during the night watch.
Israeli has yet to issue a statement on the deadly raid.