On January 8, Russia’s TASS news agency reported that Russia is developing a new 4,500 km range variant of the Kalibr land-attack cruise missile. According to an unnamed source in the Russian military-industrial complex, the longer range Kalibr-M is in early development and is planned to be deployed on frigates, nuclear submarines, and other surface ships by 2027. Currently, the Kalibr-M has a maximum range of 1,500-2,500 km. The source also noted that the new missile will have larger dimensions than current versions and a nearly 1,000 kg warhead. TASS could not confirm the information provided by the source, and Russian officials have yet to comment on this development.