The BBC's Rushdi Abou Alouf in the Gaza Strip described the chaos as Israeli warplanes fired missiles at Hamas targets, killing at least 155 Palestinians.
Israeli planes are still flying over Gaza and they have just targeted another Hamas [security] compound in the middle of the Gaza Strip, in a place called Khan Younis.
We can see from our office here in Gaza, in the middle of Gaza City, ambulances are still evacuating the injured from buildings and school kids are trying to find secure places.
People who were going to their work were turned back and went home, and most of the residents in Gaza have been ordered by the ministry of health to stay indoors.
The mosques in Gaza are calling the people here to go to the hospitals and to donate blood.
Doctors say the operating rooms are full and the morgues are full and they have no place to put the dead bodies.
They are asking for every doctor who is not working today to come and help.
We have seen in the streets of Gaza today and this evening many funerals.
No safe places
It's a very bad situation... There were Israeli aeroplanes everywhere, hitting everywhere. You could see smoke from north to south, from west to east. The people are really in a panic. The main object for the people now is to find a secure place to secure their family.
Gaza has no shelters, it has no safe places. The Hamas security compounds are in the middle of the city - it's not the kind of place where you see compounds outside the cities.
I have witnessed one of the compounds - which is 20m [yds] away from my house - I was standing on the balcony and I have seen the Israeli airplanes hitting the place.
Some of my balcony was damaged and my kid was injured.
Many people were injured inside their houses today.
I saw an Israeli fighter drop a bomb on a building, flattening it. Smoke was coming from it. Kids were panicking and screaming.
It took rescue teams six hours to evacuate injured from the place and they are still searching under the rubble, trying to find any survivors.