Israeli forces fought with Palestinian fighters in the occupied West Bank city of Jenin, accused of using tear gas in hospital.
Israeli troops have killed at least four Palestinians and wounded several others during armed confrontations in Jenin, in the northern occupied West Bank, according to witnesses and medics.
An elderly woman has been reported among the dead, according to Palestinian officials.
The Palestinian health minister, Mai al-Kaila, also said that Israeli forces had used tear gas canisters at a paediatric hospital in Jenin, causing children to choke.
The Israeli military confirmed that an operation was under way in Jenin on Thursday, but did not immediately provide further details.
Jenin is among areas of the northern West Bank where Israel has intensified raids over the past year, in an attempt to crackdown on growing armed Palestinian resistance.
The identities of the casualties in Jenin were not immediately clear. The Palestinian armed groups Hamas and Islamic Jihad said their fighters were battling Israeli troops.
The number of Palestinians killed by Israeli forces during raids in the occupied West Bank and East Jerusalem in January is now 24, including five children.
More than 170 Palestinians were killed in such raids in 2022, many of them civilians.