A Palestinian official said hundreds of people began leaving their homes in a flashpoint area of the West Bank on Thursday as Israeli forces pressed a deadly operation there. Israeli forces have also detained several Palestinians from the Jenin area,

Prime Minister Benjamin Netanyahu said the assault on Jenin would be “extensive and significant,” as the military erected new checkpoints across the West Bank.

At least 10 people have been killed in the raids, and more than 40 wounded, according to the Palestinian Health Ministry. Dozens have been arrested, Palestinian officials told the Wafa news agency.