The Israeli military unleashed a wave of heavy airstrikes on the Gaza Strip early Monday, saying it destroyed 9 miles of militant tunnels and the homes of nine Hamas commanders, as international diplomats worked to end the week of fighting that has killed hundreds of people.

Israel slammed the Gaza Strip with airstrikes on Saturday, in a dramatic escalation that included bombing the home of a senior Hamas leader, killing a family of 10 in a refugee camp — most of them children — and pulverizing a high-rise that housed The Associated Press and other media.

Hamas sent a heavy barrage of rockets deep into Israel on Thursday as Israel pounded Gaza with more airstrikes and shells and called up 9,000 more reservists who could be used to stage a ground invasion.