Israeli troops are massed at Gaza's northern border
People living in the Gaza Strip say they heard four sonic booms from Israeli warplanes early on Thursday, shattering their sleep for a second night.
The BBC News website spoke to three Palestinians in Gaza about their situation as the tension with Israel continues.
DOAA ABU-HARB, STUDENT, RAFAH
Today I went to Gaza City to sit my English grammar exam, the last exam on the last day of term.
I tried to do my best and to create a new environment around me while I was sitting the exam. I tried to imagine that nothing was happening.
Afterwards, there were huge air strikes and attacks. I was so frightened I left Gaza City at once.
Normally the journey takes no more than half an hour. Today it took more than an hour. We had to take a different route because they destroyed the bridges and damaged some roads.
The situation in Rafah is better today than it was yesterday. But I can still hear shelling.
We get electricity for maybe two hours a day, but it's not enough.
LAMA HOURANI, NGO WORKER, GAZA CITY
We are the hostages, believe me, not the soldier.
The shelling is now coming closer to residential areas.
We have had some electricity, but some friends of mine have only had three hours of power.
The electricity comes from Israeli generators. So if they decide to cut it off, people will die.
Why isn't the world saying anything about this?
Israel is our enemy. It doesn't treat us as people.
It makes me so angry that Israel has arrested Hamas politicians. Hamas was the Palestinians' democratic choice, whether people like it or not.
Why isn't the world saying anything about this? We are the ones being occupied yet all we hear from the West is that Israel has the right to defend itself.
I am someone who believes in peaceful resolutions. I need support so I can convince others of this way.
SAID ABDELWAHED, UNIVERSITY PROFESSOR, GAZA CITY
We heard four sonic booms this morning. The first was just before 4am.
Before that Israeli F16s targeted a football ground at the Islamic University. Causing whatever a bomb causes. I heard it, it's about four minutes' drive from here.
Israel says this shop in Khan Younis was in fact a weapons factory
Nearly an hour ago, near where I live, an Israeli plane or helicopter, we don't know, missed its target. A man, his wife and child were in a car. They escaped, they are destined to live.
Everyone is fine. We are managing.
We have a generator but we don't use it all the time because there is a fuel shortage. The worst is yet to come.
The municipality has put a notice in the papers saying they used to pump water for 14 hours a day, but now it will be two hours a day.
They will distribute the supply among the neighbourhoods.
It's a good job the telephone doesn't operate by gas or electricity, so at least we can still talk.