Some parts of the US State Department do not find Israel’s assurances that its forces are using US weapons in accordance with international law to be “credible and reliable,” a department official said Sunday.

The State Department is divided over whether Israel is using American-provided weapons in accordance with international law ahead of a fast-approaching deadline next week for Secretary of State Antony Blinken to make a determination to Congress.

There is not unanimity about whether to accept Israel’s assurances about this as “credible and reliable,” a department official said. Israel was required to make those assurances to the US under a national security memorandum issued by President Joe Biden in February.

The memorandum requires all countries receiving US weapons to make assurances that they are using them “in a manner consistent with all applicable international and domestic law and policy, including international humanitarian law and international human rights law.”

Under that memorandum, Blinken must tell Congress by May 8 whether he has certified the assurances to be credible and reliable.