An Israeli airstrike killed at least five people in the West Bank city of Tubas on Wednesday, Palestinian emergency services said, as Israeli security forces continued an extended operation.
The Palestinian Red Crescent said rescue crews had recovered five bodies at the site and had transferred them to hospital.
The Israeli military confirmed the strike, but gave no details.
"As part of the counter-terrorism activity, an IAF (Israeli Air Force) aircraft struck an armed terrorist cell a short while ago in the area of Tubas", it said in a statement.
Entrances and exits from Tubas were sealed off and Israeli military vehicles, including road diggers and armoured personnel carriers, could be seen moving through the city, close to the border with Jordan at the northern end of the West Bank.
Israeli forces have been conducting a series of operations in the northern West Bank for the past two weeks, with extended raids in Tubas, Jenin and Tulkarm. All three cities have a heavy presence of armed factions including Hamas, Islamic Jihad and Fatah.
Heavy clashes between Israeli forces and Palestinian fighters have been reported, while streets and infrastructure in all three cities have suffered extensive damage as Israeli forces have dug up roads and targeted militant bases.
On Tuesday, a Palestinian man and woman were killed during an Israeli raid on Tulkarm, Palestinian health authorities said.