(CNN) -

The language of war leaves something lost in translation.

Israeli Defense Minister Moshe Ya'alon on Saturday spoke of "achievements" and the destruction of "significant targets" in his country's airstrikes against Hamas targets in Gaza.

But on the ground in Gaza, sources talked with CNN not about military targets, but about hospitals pushed to the brink, dead or distressed children, and airstrikes that struck water infrastructure.

"No one is talking about the Palestinian civilians. When you bring up this story, no one is ready to listen," a Hamas spokesman, Osama Hamdan, told CNN's Wolf Blitzer. "But when it came to Israelis, everyone is taking care and everyone is talking."

Though a full-scale invasion has not occurred, Israeli military forces went into Gaza for half an hour early Sunday and raided a long-range missile launching site, an Israeli military source told CNN.

Gunfire was exchanged and four Israeli soldiers were "lightly injured," the source said, adding that the mission was accomplished.

The death toll from the airstrikes on Gaza this week has topped 160, Ashraf al-Qidra, a spokesman for the Gaza Health Ministry, said early Sunday. More than 1,100 people have been injured.

On Saturday, at least 23 people were killed in Israeli airstrikes, said security and medical sources in Gaza. An official at Shifa Hospital told CNN that the morgue there was now full.

One airstrike targeted the house of the head of the Gaza police, Tayseer al-Batsh, and killed at least 15 people and injured an unknown number of others, security sources in Gaza told CNN. Aqsa TV showed rescuers frantically digging for survivors.

The airstrikes hit the house, which is next to a mosque. The sources say that some of the casualties had been in evening prayers at the mosque.

And, an Israeli airstrike hit a facility housing the disabled, killing two women, the health ministry said Saturday. Israel Defense Forces said it was looking into that claim.

Four Israeli airstrikes hit the Arafat Police complex in Gaza city early Sunday, shaking nearby buildings, including the offices of CNN and other media.

The Israeli military is telling residents of northern Gaza to evacuate their homes for their own safety, CNN correspondent Ben Wedemen reported Saturday.

Israel Defense Forces says it uses phone calls and drops empty shells on roofs -- what it calls "roof knocking" -- to warn civilians that airstrikes are imminent.

Concerns about a ground invasion by Israeli forces are growing. The U.N. Security Council on Saturday called for a de-escalation and cease-fire between Israeli forces and Palestinian militants, the 15-member group said in a statement.

Israel's stated mission is to get Hamas militants to stop firing rockets into Israel, something that has not happened. Even after days of bombardments from Israeli jets, more than 36 rockets were fired from Gaza on Saturday, and the sun had not even set.

Two of those rockets were intercepted by Israeli air defense, and 34 struck Israel. The IDF said at least two rockets fired from Lebanon hit open areas north of coastal Nahariya, but no damage or injuries were reported.

Israel asserts its right to defend itself, and so far the Hamas rockets have caused no deaths.

"Achievements are accumulating in terms of the price that Hamas is paying, and we are continuing to destroy significant targets belonging to Hamas and other terrorist organizations," Ya'alon said. "Hamas is suffering from severe blows and is causing severe damage to its people."

Hamas frames the current conflict as a defensive fight.