Iran-backed terror group Hamas kidnapped Israeli women and children in atrocities caught on camera as its terrorists infiltrated the Jewish state in an unprecedented attack.

Hamas's ongoing assault on Israel, which began early Saturday, has left at least 700 Israelis dead and thousands more injured. Israel's security cabinet on Sunday formally declared war against the Gaza-based terror group, which Prime Minister Benjamin Netanyahu said "will pay an unprecedented price."

"This war will take time," Netanyahu said. "It will be difficult."

Iranian officials worked with Hamas to plan the terrorist assault, the Wall Street Journal reported.