At least 11 people are dead and another 20 injured since the Israel Defense Forces launched operations in the West Bank overnight Tuesday, according to the Hamas-run Palestinian Ministry of Health.

Amid rising calls for a pause in fighting to administer polio vaccinations to children in Gaza, Hamas is saying Israel's temporary pause is not enough.

"This suspicious method that Netanyahu and his government are trying to impose will thwart the United Nations' move and deprive hundreds of children of vaccination against polio," Hamas said in a statement Wednesday.

It is still unclear if Prime Minister Benjamin Netanyahu's plan is different from the United Nation's requests for a temporary pause in fighting.

Hamas is calling for a comprehensive truce throughout Gaza to allow for a polio vaccination campaign.

-ABC News' Will Gretsky

The World Food Programme announced it is pausing the movement of its employees in Gaza until further notice after its team came under fire on Tuesday, near an Israeli checkpoint.

The WFP team -- traveling in two armored vehicles -- was returning from a mission to Kerem Shalom after escorting a convoy of trucks carrying humanitarian cargo routed to central Gaza.

"Despite being clearly marked and receiving multiple clearances by Israeli authorities to approach, the vehicle was directly struck by gunfire as it was moving towards an Israeli Defence Forces (IDF) checkpoint. It sustained at least ten bullets: five on the driver’s side, two on the passenger side and three on other parts of the vehicle. None of the employees onboard were physically harmed," the WFP said in a statement.

WFP called for protection of humanitarian workers providing essential aid to civilians in Gaza.

"The incident is a stark reminder of the rapidly and ever shrinking humanitarian space in the Gaza Strip, where increasing violence compromises our ability to deliver life-saving assistance. The already critical situation is exacerbated by restricted access and heightened risks, leading to decreased food supplies reaching those in desperate need," WFP said.

-ABC News' Will Gretsky

Israeli Prime Minister Benjamin Netanyahu has approved "limited pauses" in fighting to allow for polio vaccinations for children in Gaza amid calls from international aid organizations, according to an Israeli official familiar with deliberations.

The pauses will only be in designated areas, according to the official.

A 10-month-old baby was paralyzed and became the first confirmed case of polio earlier this month.

-ABC News' Jordana Miller