More than 60 Democratic lawmakers are pushing the Donald Trump administration to clarify whether Israel uses American military equipment to demolish Palestinian homes in the West Bank, hinting that doing so could trigger military aid restrictions under US law.

Reps. Ro Khanna, D-Calif., Anna Eshoo, D-Calif., and Steve Cohen, D-Tenn., sent a letter to Secretary of State Mike Pompeo today asking him whether Israel is complying with end-use restrictions under the Arms Export Control Act.

“The United States should work to prevent unlawful home demolitions and the forcible transfer of civilians everywhere in the world and prevent the use of US-origin equipment in this destructive practice,” the lawmakers wrote. “The faithful implementation of the [Arms Export Control Act] is one important oversight tool for ensuring that US-origin defense articles and other items recipient countries purchase with foreign military financing are not used for such purpose outside the scope of ‘legitimate self-defense.’”

The letter also inquires as to whether American-made Caterpillar bulldozers used to demolish 70 Palestinian apartments in Wadi al-Hummus last year were purchased with Israel’s annual $3.3. billion in US foreign military financing.