Direct proof of use
Public evidence ties the Tosan anti-tank guided missile to Houthi-aligned forces in the Yemen war through possession, transfer, and stockpile documentation. CSIS reported that UAE troops seized one Tosan rocket from a Houthi base at Safir in Marib Governorate in September 2016, and that the United States later displayed a Tosan ATGM seized by Saudi forces in Yemen.
The Washington Institute, summarizing Conflict Armament Research findings, separately described an Oman-route cache that included an Iranian-made Tosan ATGM, identified as Iran's copy of the 9M113 Konkurs. The same report distinguished that arms-flow evidence from battlefield capture evidence involving other ATGMs, including Kornet and Dehlavieh missiles.
Sources: CSIS Missile War in Yemen, Washington Institute Arms Smuggling
Timeline
The Tosan-specific record begins after earlier Konkurs-family interdiction reporting. ARES reported in September 2015 that a coalition interdiction included 9M113 Konkurs missiles and related equipment, while noting uncertainty over the shipment's final destination and explaining that Iran had advertised its domestic Tosan-1 copy of the Konkurs.
By September 2016, investigators and later secondary reporting had identified a Tosan rocket in a Houthi-linked Marib context. In November 2018, a U.S. public display described a Tosan rocket as one of five seized in a stockpile by Saudi forces in Yemen.
Sources: ARES Saudi-led Coalition Seizure, CSIS Missile War in Yemen, Iran Primer Arms Transfer Display
Battlefield role
In Yemen, Tosan is best documented as a Houthi-aligned anti-armor missile supply and stockpile item rather than as a separately confirmed firing event. Its role belongs to the same AT-5/Konkurs anti-armor ecosystem used along the Saudi-Yemen border, but the strongest public Tosan evidence identifies seized missiles and caches rather than target-specific launches.
CSIS reported multiple videos purportedly showing Houthi militants using AT-5 ATGMs against Saudi armor in northern Yemen and southern Saudi Arabia, and cited a 2016 United Nations Panel of Experts finding of video evidence showing Houthi fighters using a Konkurs ATGM against a Saudi tank along the Saudi border. Those accounts support combat use of the Konkurs/Tosan-class family, while the Tosan-specific claims support fielding, possession, and supply to Houthi-aligned forces.
Sources: CSIS Missile War in Yemen