Israeli security forces are carrying out operations to rescue hostages taken by Palestinian militants from Gaza and clear areas they seized on Saturday.
The military said troops had secured 22 locations yesterday but were still sweeping through another eight.
The surprise attack by hundreds of gunmen from Hamas, under the cover of intense rocket fire, has reportedly killed at least 600 people in Israel.
More than 370 people in Gaza have been killed in retaliatory Israeli strikes.
And 400 Palestinian gunmen have been killed and dozens arrested during the fighting in Israel, according to the Israeli military.
Saturday saw Israel’s deadliest day of violence since the Yom Kippur war 50 years ago.
Prime Minister Benjamin Netanyahu said on Saturday night that Israel was going into a “long and difficult war”. He also warned Hamas, which governs Gaza, that its hideouts would be reduced to “rubble”.