|Palestinian police officers during clashes with militants in Jenin|
Military officials said the gunmen drove past the victims, firing on them from their car.
Earlier, Palestinian officials said gunmen in the West Bank killed a Palestinian policeman late Thursday during an attack on a police station in Jenin.
The motive for the shooting was unclear, but security officials told the Reuters news agency it appeared to be linked to a dispute between police and a local militant.
The attack came hours after the Palestinian Authority agreed to give jobs to hundreds of militants in an effort to end growing lawlessness.
Israel and Washington have pressured Palestinian leader Mahmoud Abbas to disarm militants.
Some information for this report provided by AFP, AP and Reuters.