Biden can retaliate without effect on hostage deal, Washington says.
The Iranian policy with Kataib Hezbollah is similar to its policy with Hamas after the massive unprecedented attack on Israel on October 7.
Iranian-backed groups have also targeted US forces in Iraq and Syria over the last four years with dozens of attacks.
This hints that the IRGC is likely coordinating the attacks and "corralling" Iran's proxies which would normally argue over public leadership.
The group, which goes by the Islamic Resistance in Iraq, claimed 11 attacks against US forces on Friday, the most in a single day since they began in mid-October.
A ballistic missile attack that targeted Ain al-Assad caused one death, several non-serious injuries, and some minor damage to infrastructure.
The US Treasury Department in a statement on Friday said it imposed sanctions on six people affiliated with Kata’ib Hezbollah.
A senior leader of Kataib Hezbollah warned that Blinken, who they referred to as "son of a Jew," was not welcome in Iraq.
Iran-backed militias in Iraq, Syria, and Yemen have upped their threats against the US and Israel amid the ongoing war.
Iran wants to create instability and a power vacuum in eastern Syria and then to fill the vacuum