A Palestinian official on Tuesday denied Israeli charges of syphoning off cement imports to Gaza and warned of a potential "explosion" unless a cement ban is lifted.
Earlier, Israel announced it had stopped private imports of cement to the Hamas-run Palestinian enclave, accusing Imad al-Baz, deputy director of the Economy Ministry, of diverting supplies.
Baz now denies any offense, saying the imports were in line with a UN-brokered Gaza Reconstruction Mechanism, aimed at allowing for reconstruction following Operation Protective Edge.
"We don't interfere with the cement mechanism," he told AFP, adding that all cement distribution sites in Gaza are monitored by Israeli cameras.
He warned that Israel's decision would have "dire consequences" including "stopping the wheels of reconstruction, destroying the economy and increasing unemployment with adverse repercussions for tens of thousands of citizens.
"If Israel continues to prevent the supply of cement to Gaza, the situation will explode in the face of the occupation and it will bear the responsibility."
The Israeli Defense Ministry body responsible for implementing government policies in the Palestinian territories, COGAT, accused Baz on Monday of taking "construction materials intended for civil reconstruction."
"This is a clear example of how Hamas continues to abuse and harm Gaza's civil population to advance their own personal agenda," it charged.
Robert Piper, the UN humanitarian coordinator for the Palestinian territories, said they did not have the evidence Israel was referring to, but were seeking to resolve the issue.
The ban only affected private providers, he said, so Qatar, a major donor to Gazan reconstruction, and the United Nations were still able to bring in cement.
"We're hoping that this will be kept to a very short window," he told AFP. "It mustn't drag on because it will have an impact on the recovery process."
Over 1.2 million tons of construction materials have entered Gaza since the reconstruction mechanism was set up in 2014.
According to an Israeli official, 80 truckloads of cement enter Gaza weekly, each one carrying 40 tonnes.
In recent months, Hamas has been openly rebuilding tunnels destroyed in 2014 that could be used to attack Israel.
AFP contributed to this report