Singapore detained two teenagers under internal security laws for extremist activities. One planned mosque attacks, while the other sought to join ISIS or marry an ISIS fighter.
The US attorney-general said that the United Healthcare killer carried out "a premeditated, cold-blooded assassination."
Police found that the suspect, a 41-year-old resident of al-Eizariya, had a criminal background, was known to security officials, and was Hamas-affiliated.
Israeli media later named the terrorist as Karem Jabarin, 25, from the village of Ma'ale Iron in northern Israel.
The victim sustained moderate wounds to his leg and was transferred to the hospital.
The 18-year-old shooting victim arrived at the industrial zone of Ariel with a gunshot wound and was treated by MDA paramedics.
Photos and videos from the scene depict a significant law enforcement presence responding to the incident.
EMTs and paramedics have pronounced a 70-year-old male dead and are treating four patients.
Nasser was rushed to Meir Hospital in Kfar Saba, where he succumbed to his injuries the next day. His murder remains under police investigation, though he had no known ties to criminal activity.
Including the most recent deaths, about 50 Arabs have been killed in violent, crime-related incidents this year, up from 27 last year.