On May 1, assailants opened fire on Qaddura Musa's home in Jenin. The governor left his home with security chiefs to investigate when he suffered a heart attack that killed him, police spokesman Mujahid Rabiya said.

Adnan Dmeiri, spokesman of the West Bank security services, said Thursday that forces have uncovered the circumstances of the shooting and detained the gunmen, adding that investigations were ongoing.

Dmeiri did not go into detail about the identities of any suspects or how many are being held.

On Monday the district's commander Radi Asida told Ma'an that corrupt officers were responsible for the security chaos that preceded the deadly incident.

Authorities overlooked the corruption "for some time," Asida said.

Officials say a number of PA security officers had been arrested on various charges as part of a crackdown on the city in the wake of the shooting attack.

Newly-appointed Jenin governor Talal Dweikat has vowed to improve security in Jenin, which was known as a center for Palestinian fighters during the second intifada.

In April, a man was killed in shoot-out with Palestinian security forces near Jenin.