Forty congressmen asked Biden to stop supplying arms to Israel. “We again urge you to refrain from any supply of offensive weapons until the investigation into the airstrike is completed,” the text reads.

Biden also issued an ultimatum to Israeli Prime Minister Benjamin Netanyahu, threatening to stop helping Israel if he does not change the operation in the Gaza Strip. It was previously reported that the US and Israeli armed forces are on high alert due to a possible attack by Iran. The letter was sent to US President Joe Biden and Secretary of State Antony Blinken.