"An international warrant has been issued for the accused," Petrenko said.
The four militants in question were members of Jebhat an-Nusra terrorist organisation, which was later renamed to Hayat Tahrir al-Sham.
In 2018, the Russian Defence Ministry announced that the Russian Su-25 piloted by Filipov was downed by a man-portable air defence system operated by militants during an overflight of Syria's Idlib de-escalation zone.
The pilot ejected from the plane, landed in an area controlled by Jabhat an-Nusra* and fought against the terrorists until his death.
*Jabhat an-Nusra [al-Nusra, The Nusra Front] - a terrorist group banned in Russia and many other countries