European Union foreign policy chief Federica Mogherini warned on Sunday against the escalation of violence in the Palestinian territories in separate phone calls to Israeli Prime Minister Binyamin Netanyahu and Palestinian Authority chairman Mahmoud Abbas.

"I talked now with Prime Minister Netanyahu and President Abbas on escalation of violence. Need to stop acts of terror and to avoid disproportionate reactions," Mogherini said in a tweet quoted by AFP. Mogherini’s statement followed separate conversations on Saturday night between U.S. Secretary of State John Kerry and Netanyahu and Abbas, in which he shared his "deep concern" over the recent wave of terror in Israel.

Kerry called both leaders "to express his deep concern over the recent wave of violence and offer his support for efforts to restore calm as soon as possible," a State Department statement said.

"He reiterated the importance of strongly condemning violence and combating incitement, and taking affirmative steps to reduce tensions."