Ukraine reportedly discovered a Russian drone armed with a “napalm-type” liquid incendiary mixture for which there was no known official designation.

The Russian-produced Geran drone, which is based on the Iranian designed Shahed, is the weapon of choice during Russian strikes on Ukrainian infrastructure and typically carries an explosive warhead weighing 50–90 kilograms (110-198 pounds).

The Ukrainian Telegram channel LandminesAndCoffee, which focuses on explosive devices encountered during the full-scale war, wrote on Wednesday that it believes Russia is “experimenting with warheads.”

It said the photos of the warhead were provided by its unnamed subscribers. It is unclear when and where the drone was downed.

The channel said markings suggest it was carrying the 90 kilogram warhead but contains “a red-brown colored liquid incendiary mixture” that it believes to be napalm.

Alongside the liquid mixture were the Russian OFBCh-2 high-explosive fragmentation munition, previously found in Moscow’s other drones, along with a UZ-2 low-altitude inertial detonator previously reported by the channel.

According to the photos, the warhead appears to consist of an enclosed canister with the OFBCh-2 embedded in the middle, surrounded by the liquid mixture.

An extra portion of the liquid mixture was also placed in the drone’s nose inside a standard fuel tank found on the Gerbera drone, another of Moscow’s kamikaze drones.

The channel believes this warhead combination was “aimed at causing maximum damage through its increased fire effect.”

Similar combinations have been found in Shahed drones in recent months. In May, military issues website Defense Express wrote that a new Russian-made variant, indexed as KOFZBCh, which includes a warhead that combines shaped charge, fragmentation, high-explosive, and incendiary effects.

It employs the explosive compound TGF-35P2 – a mix of TNT and phlegmatized hexogen (RDX) – and a metal hydride-based incendiary powder capable of burning at up to 3,500°C (6,332°F).

Defense outlet Militarnyi, which reported on LandminesAndCoffee’s findings, noted that new fragmentation warheads capable of detonating mid-air have also been spotted on recent drones.

Militarnyi wrote that a LiDAR sensor – that uses a pulsed laser to measure the range to a target – was found in one of the recently downed drones, suggesting that it is capable of detonating before impact to maximize damage.

As reported by Kyiv Post in July, Russia has improved the kamikaze drones both in terms of the quantity and type of explosives used to maximize lethality since the weapons were first used during Russia’s 2022 full-scale invasion of Ukraine.