FILE -- In this Feb. 22, 2016 file photo, a Palestinian woman hangs clothes in a section of a damaged apartment block, which was partially destroyed during the 2014 war between Israel and Hamas, in Beit Lahiya, Gaza Strip. The international charity World Vision says Israel has accused it's Gaza director of diverting sums to Hamas that exceed its total budget. Israel's Shin Bet security agency says Mohammed el-Halabi confessed to siphoning about $7.2 million a year to Hamas over a period of five years. Israel indicted el-Halabi Thursday, Aug. 4, 2016. World Vision says this figure is more than its total budget of $22.5 million over the last decade. Building supplies intended to support farming projects were transferred to Hamas for constructing tunnels and military installations, according to the Shin Bet. (AP Photo/Hatem Moussa, File)

JERUSALEM - The international charity World Vision said on Monday that Israel has accused the charity's Gaza Strip director of funneling what appears to be an impossible sum of money to Hamas.

Israel's Shin Bet security agency said Mohammed el-Halabi siphoned about $7.2 million a year to the Islamic militant group over a period of five years. The security agency said this is roughly 60 per cent of World Vision's total Gaza budget.

World Vision Germany spokeswoman Silvia Holten said the charity's budget in Gaza in the last decade totalled $22.5 million. She said World Vision has stopped its Gaza operations while investigations continue. Germany and Australia suspended donations to World Vision in Gaza amid the allegations.

"There is a huge gap in these numbers the Israeli government is telling and what we know," Holten said.

Israel indicted el-Halabi last Thursday.

According to the Shin Bet, el-Halabi crafted an elaborate scheme to funnel funds, food, medical supplies and agricultural equipment to Hamas. He fraudulently listed the children of Hamas operatives as wounded, created straw organizations, and inflated project costs to divert cash, the agency said. Building supplies intended to support farming projects were transferred to Hamas for constructing tunnels and military installations, according to the Shin Bet.

The allegations, if proven correct, would bolster Israel's arguments for maintaining its blockade of Gaza, imposed after Hamas seized power in the coastal strip in 2007. Israel says the closure is vital to preventing Hamas from importing weapons and materials used to attack Israel.

Robert Piper, the U.N. co-ordinator for aid in the Palestinian territories, said Monday that the allegations against el-Halabi "raise serious concerns" for aid groups in Gaza, and that, if proven true, "deserve unreserved condemnation." He called for a fair and transparent trial.

Attorney Nitsana Darshan-Leitner, president of Israeli legal advocacy group Shurat Hadin, said her organization warned World Vision four years ago its funding was being diverted to armed militant groups in Gaza. She said she discovered this while her group researched a lawsuit against the Popular Front for the Liberation of Palestine, which in the past was involved in attacking Israelis. She said the PFLP used front organizations that appeared as beneficiaries on the World Vision website. Darshan-Leitner said she is exploring suing World Vision in the United States for aiding and abetting terrorism.

"Foreign NGOs want to give money to Gaza," Darshan-Leitner said, even as they "ignore all the signs that their money is diverted to terrorism."

World Vision did not immediately respond to the charge.

The U.S. also funded humanitarian projects run by World Vision through 2011, which overlaps with el-Halabi's time as Gaza director. The U.S. State Department said in a statement that it is closely following the Israeli investigation. If confirmed, Hamas's embezzlement of aid funds would be "reprehensible," according to the statement.

Israeli Foreign Ministry Spokesman Emmanuel Nahshon speculated that World Vision's budget does not include in-kind donations like food.

"They are trying to belittle their role and to show they are much smaller than they really are," Nahshon said of World Vision. He did not provide proof of his claim, but said el-Halabi's legal team will have access to the evidence. He added that el-Halabi confessed to his crimes, but el-Halabi's lawyer Mohammed Mahmoud said his client did not confess.

Holten said the World Vision budget includes all in-kind donations, but she did not provide a detailed report of the organization's spending in Gaza in recent years. She said World Vision performs stringent internal audits and commissions external audits from outside companies as well.

El-Halabi's father has denied he is a member of Hamas. A spokesman for Hamas in Gaza, Hazem Qasem, has called the allegations "lies."

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News from © The Associated Press, 2016