Israel’s military suggested on Tuesday that the United Nations ask Hamas for fuel supplies after the U.N. agency providing aid to Palestinian civilians in the Gaza Strip warned it would have to halt operations on Wednesday night if no fuel was delivered.

The agency, known as UNRWA, posted its warning on social media on Tuesday. The Israel Defense Forces reposted it and said that Hamas militants have more than 500,000 litres of fuel in tanks inside besieged Gaza.

“Ask Hamas if you can have some,” the IDF wrote.