(JNS) The IDF launched a large-scale counterterrorism operation in the Jenin and Tulkarem areas of northern Shomron overnight Tuesday, August 27, involving hundreds of troops and air support.

Nine Palestinians were killed, according to the IDF—three armed terrorists who posed a threat to security forces in Jenin in an aerial strike, two armed terrorists in clashes with Yehuda and Shomron Border Guard forces and another four in a drone strike in the Far’a camp in Tubas.

Israeli forces have also arrested several Palestinians during the operation, which is expected to last for several days. Weapons, ammunition and military equipment were also confiscated.

Israeli forces also “exposed and dismantled explosives that were planted under the roads” and which were intended to be used in attacks against IDF troops.

Two brigade combat teams are taking part in the operation, with most of the forces being concentrated near Tulkarem, according to Ynet. In addition to the IDF, the Israel Security Agency and Israel Border Police are participating in the operation.

The Israeli military also revealed on Wednesday morning, August 28 that five terrorists were killed on Monday in a joint IDF and Israel Security Agency operation near Nur Shams in northern Shomron.

One of the fatalities, Jibril Ghassan Ismail Jibril, was released from prison as part of the Israel-Hamas hostage deal reached in November.