JERUSALEM — Israel’s Cabinet voted Monday to seize the Gaza Strip for an unspecified amount of time in a move that could see Israel reestablish control over a territory it vacated two decades ago. Israel withdrew from Gaza in 2005 after a decades-long occupation and then imposed a blockade on the territory along with Egypt.

An Israeli plan to seize the Gaza Strip and expand the military operation has alarmed many in the region. Palestinians are exhausted and hopeless, pummeled by 19 months of heavy bombing. Families of Israeli hostages still being held in Gaza are terrified that the possibility of a ceasefire is slipping further away.

The new plan would push hundreds of thousands of Palestinians to southern Gaza and likely exacerbate an already dire humanitarian crisis.