On Sunday, the Israeli military announced that it targeted the home of a top Hamas leader in Gaza.
Since fighting broke out earlier last week, Hamas and the Islamic Jihad group have acknowledged that 20 fighters have been killed in targeted Israeli strikes, while the Israeli military has said that this number is significantly higher.
In renewed airstrikes on Gaza, Israeli warplanes struck a six-story residential building that it said belonged to Hamas, the Islamist group that controls the Palestinian enclave. Netanyahu said Israel has struck close to a thousand militant targets in Gaza in total.
The four days of cross-border violence showed no sign of abating and Israeli Prime Minister Benjamin Netanyahu said the campaign "will take more time".
According to the Palestinian Ministry of Health, at least 21 civilians have been killed by Israeli air raids on the besieged Gaza Strip, after Hamas launched retaliatory rockets from the coastal territory.
The aerial bombardment occurred after Hamas fired several rockets at Israel, after Israel refused to withdraw forces from the Al Aqsa Mosque in Jerusalem.