Israeli Prime Minister Benjamin Netanyahu said on Thursday that defeating Hamas is more important than releasing the 59 prisoners.
Israeli Chief of Staff Eyal Zamir vowed on Thursday to soon intensify operations in Gaza if necessary.
Zamir said, "The Israeli army is prepared to deliver a decisive blow to Hamas and to intensify the operation - if necessary, we will do so soon."
He added, "Alongside the important achievements, we still face challenges, foremost among them the return of the captives to their homes. At the same time, we are responsible for defeating Hamas, returning the displaced to their homes, and establishing a stable and secure security reality for generations to come."