As Israeli fighter jets, attack helicopters, and armed drones continue to pummel Gaza for a fourth day, children—who comprise half of the population of this besieged strip—face mounting wounds and deaths.

According to a list of the dead released Friday by Ashraf al-Qudra, spokesperson for Gaza’s Health Ministry, at least 105 Palestinians—including at least 23 children—have been killed. Many of the at least 785 people who have been wounded are children, health officials report.

With a population of 1.7 million people living on 140 square miles, Gaza is one of the most densely populated areas on Earth. Palestinian residents of Gaza must obtain Israeli permission before exiting, leaving the vast majority trapped in the path of the over 1,000 air strikes launched by Israel this week.

“Here, there are no warning sirens. Only the noise of the F-16s warn us that the bombs are close.” —Rany Hemaid, lecturer at Al-Aqsa University in Gaza

There is no safe place to take shelter from the bombs falling on Gaza—which has been described as the world’s largest open-air prison. Decades of economic and military siege have depleted medical supplies for treating the dying and wounded, as well as fuel—which is critical for running hospital generators and ambulances. These shortages have grown especially acute during this latest onslaught, with the World Health Organization warning that health systems are close to collapse.

Reports are emerging that Israeli air raids are targeting critical civilian infrastructure, including schools and hospitals. Gaza’s Ark—a Palestinian-led initiative to break the siege on Gaza—was also reportedly hit, with no loss of life reported in that attack.

Meanwhile, stories of death and loss continue to accumulate.

Suleiman Salim Mousa al-Astal, aged 17, and Mousa Mohammad Taher al-Astal, aged 14, were among eight people killed on Thursday when an Israeli air craft bombed a crowd that had gathered on a beach in Khan Yunis to watch the World Cup on Thursday night, Defence for Children International—Palestine reports.

In another instance, an Israeli air strike on the household of an alleged Hamas activist in the city of Khan Younis killed an entire family of eight, including six children.