Iran has put its long-range Mohajer-10 drones on display at a defense exhibit in Russia, Iran’s official news agency reported Monday.

U.S. officials have accused Iran of sending drones to Russia, including the Mohajer-10’s predecessor, the Mohajer-6, that Moscow had used in its invasion of Ukraine. Tehran denies this.

Iran’s official Islamic Republic News Agency said the more advanced system was being shown at the Army 2024 International Military-Technical Forum, an event that runs from Monday to Wednesday in Patriot Park outside Russia’s capital.

The report came as the Middle East braces for Iran’s threatened retaliation against Israel after the killing of Hamas chief Ismail Haniyeh in Tehran on July 31.

Iran released details of the Mohajer-10 system in August last year, saying it had an enhanced flight-range duration and could carry a greater payload.

A video accompanying that report showed the drone alongside other military hardware, with text saying “prepare your shelters” in both Hebrew and Persian.

According to Iranian media reports, the drone has an operational range of 2,000 kilometers (1,240 miles) and can fly for up to 24 hours. Its payload can reach 300 kilograms (661 pounds), double the capacity of the Mohajer-6, the reports have added.