Footage released by Iraqi parmilitary units shows them during the battle for the town of Baiji, Iraq.
Heavy clashes were filmed and Iraqi paramilitary advanced towards the positions held by militants.
The footage shows the launch and impact of TOS-1 on to militants positions and heavy street fighting inside of Baiji.
Baiji is a city of about 200,000 inhabitants in northern Iraq and is located some 130 miles north of Baghdad, on the main road to Mosul.
It is a major industrial centre best known for its oil refinery, the biggest in Iraq, and has a large power plant. With regards to transport in the area, Baiji is a junction of the national railway network.