Three Palestinians were shot dead in gun battles which erupted during a counter-terrorism raid in Jenin overnight on Saturday.
Security forces had entered the West Bank city to arrest a wanted Palestinian security suspect.
A joint force made up of the IDF, Shin Bet, and the Border Police's elite Counter-Terrorism Unit entered Jenin to arrest a Palestinian suspected of plotting attacks against Israeli civilians and military forces.
The suspect barricaded himself in his home and refused to surrender himself, the IDF said. After ignoring calls to end the stand off peacefully, the suspect, armed with an M-16, opened fire on security forces, injuring two soldiers lightly, and attempted to escape.
Soldiers returned fire, killing the armed suspect.
Security forces also killed two armed Palestinian rioters who fired on security forces, and hurled explosives, firebombs, and rocks, the army said. Six others were injured.
IDF sources said a fourth Palestinian may have also been killed.