The Israel Defense Forces have leveled at least six high-rises in Gaza since Saturday, according to reports, after fighting between Israel and the militant group Hamas resumed last week.

The targeted strikes to dismantle tall buildings, some apartments and some shopping complexes were an unprecedented escalation in the conflict. On Saturday, the IDF took down a 12-story building. The Associated Press reported that the military targeted the Zafar tower in Gaza City because of a "Hamas operations room in the building, but did not explain why the entire tower with 44 apartments was brought down."

Palestinians stand near the remains of one of Gaza's tallest apartment towers, which witnesses said was hit by an Israeli air strike that destroyed much of it. (Suhaib Salem/Reuters)

A seven-floor office building was destroyed in Rafah on Sunday. On Tuesday, a 15-story tower in an upscale neighborhood referred to as "one of Gaza’s finest residential buildings" was destroyed. It was home to about 70 families. A shopping complex also was taken down, which resulted in 20 injuries.

More than 2,000 people have died in the conflict, and more than 100,000 Gazans have been rendered homeless. An 'open-ended' cease-fire between Israel and Hamas was announced Tuesday.