The rare joint statement both eulogizes Qassem Soleimani and Abu Mahdi al Muhandis and offers vague threats of retaliation in Bahrain.
This is the second time that several Iranian-backed militias in Bahrain have voiced their support of the Iraqi Hezbollah Brigades after U.S. airstrikes on the group.
Two Iranian-backed groups in Bahrain have threatened to launch new attacks on the island if Bahrain goes through with the expected executions of two citizens accused of terrorism.
Various Shia militias from around the Middle East have expressed their support or condolences for the Iranian-backed Hezbollah Brigades, which was targeted in unclaimed airstrikes in eastern Syria on Sunday.
In recent years, Iran has stepped up its support for various Shia militant groups in the small Sunni-led kingdom. This support has been noted by both Bahraini and American officials.