"In the event of any war against Hezbollah, the movement is not going to be alone," Harakat Hezbollah al-Nujaba front man Hashim al-Mousawi told Iran's Tasnim news agency on Friday.
The group, simply known as Nujaba, is part of Hashd al-Sha'abi which is an umbrella counter-terrorism force gathering volunteer fighters from Iraq's various ethnic groups, including Shias, Sunnis and Christians.
In the event of an attack on Leb's Hezbollah, "all, including Nujaba, will be standing by its side," Mousawi said.
Israel has recently launched an operation to destroy what it claims tunnels dug by Hezbollah into the occupied territories.
Israeli Prime Minister Benjamin Netanyahu on Tuesday warned that Hezbollah would be dealt "unimaginable blows" if it confronted the operation.
Hezbollah’s deputy secretary general Sheikh Naim Qassem
... the Grand Vizier of the Hezbullies...
warned last week that there is no spot across Israel outside the range of the Lebanese resistance movement’s missiles.
"Israel is not capable of confronting Hezbollah’s missiles. The Paleostinian resistance is also advancing day by day. The resistance’s missile power is increasing," Mousawi said.