Israel-Gaza updates: Sirens sound in Tel Aviv as Hamas fires rocket from Gaza

The latest Israeli evacuation order is "inhumane" forcing "another mass movement of families and humanitarian workers from areas in Deir al-Balah - one of the only remaining areas in the occupied Gaza Strip with essential infrastructure and warehouses storing aid supplies," at least 24 nongovernmental organizations said in a joint statement Thursday.

"Many Palestinian families, already forcibly displaced countless times since October, are on the move yet again, including humanitarian workers critical to providing the limited aid response that is still possible," the NGOs said.

The Israeli designated "humanitarian zone" now encompasses less than 11% of Gaza, according to the U.N.

The NGOs also said the orders have obstructed numerous groups' aid operations and impacted medical facilities. The groups also warned they will impact the ability to administer polio vaccines, amid the increasing risk of an outbreak.

"The situation has become incredibly dangerous. There's constant fighting, and the sounds of shelling and explosions are clearly audible. Skin diseases are spreading rapidly. We’re all becoming paranoid that we’ll get infected. The physical toll is real. I’ve been having severe stomach pains, likely from the contaminated water we’re forced to drink. I don’t know how much longer we can survive like this," said Lena, a Mercy Corps staff member in Gaza, in a statement.

Four people -- including a minor -- have been arrested on terrorism charges in connection with recent deadly violence in the occupied West Bank.

Last week, Israeli settlers set fire to homes and cars in the Palestinian village of Jit, killing one Palestinian resident and injuring another. One person was arrested that night on Aug. 15 when Israeli security forces intervened. There have now been a total of five arrests.

In a joint statement issued Thursday, the Israel Police and the Israel Securities Authority (ISA) said the detainees are “suspected in several acts of terrorism against Palestinians, including the severe riots” that occurred in Jit.

“This was a severe terror event that included setting fire to buildings and vehicles, stone and Molotov cocktail hurling, as well as live fire, resulting in the killing of one Palestinian and the injuring of another.”

The investigation of the events is ongoing, the statement said.

-ABC News’ Morgan Winsor and Jordana Miller

Two people were killed and 15 others were injured after Israeli forces conducted a strike on the Salah al-Din school in Gaza City on Wednesday.

This is the second strike conducted on a school in Gaza this week. Israeli forces repeatedly claim Hamas uses and operates out of schools inside Gaza.

-ABC News' Jordana Miller

One man was killed in an Israeli strike on Sidon in southern Lebanon, according to the Lebanese Ministry of Public Health. Hezbollah also announced the death of another of its members on Wednesday.

Hezbollah also released statements taking responsibility for 10 attacks on northern Israel.

About 50 projectiles were identified crossing from Lebanon toward northern Israel, a number of which struck the town of Katzrin, where about 8,000 people live, according to the Israel Defense Forces.

One person was injured and is in moderate condition, according to Israeli emergency services.

-ABC News' Jordana Miller and Ghazi Balkiz