On the same day the U.S. military killed Iranian General Qassem Soleimani in Baghdad, U.S. forces carried out another top secret mission against a senior Iranian military official in Yemen, according to a new report.

The simultaneous strike targeting Abdul Reza Shahlai, a financier and key commander of Iran's elite Quds Force who has been active in Yemen, did not result in his death, four U.S. officials familiar with the matter told the Washington Post.

The successful January 3 strike that killed Soleimani sparked fury from the Iranian regime, which retaliated with ballistic missile strikes on two Iraqi bases that host U.S. troops.

Officials say the Pentagon would have announced the two strikes together if they had been successful, but did not disclose the Shahlai mission because it did not go according to plan.  

It's unclear why the operation to kill Shahlai was unsuccessful. 

Shahlai, born around 1957, has been linked to attacks against U.S. forces in Iraq, including a sophisticated 2007 raid in which Iranian-backed militiamen abducted and killed five Americans troops in the city of Karbala. 

Last month, the State Department offered a $15 million reward for information leading to Shahlai and the disruption of the Iranian Revolutionary Guard's financial mechanisms. 

The announcement said that Shahlai is based in Yemen and has a 'long history of involvement in attacks targeting the U.S. and our allies, including in the 2011 plot against the Saudi ambassador' at an Italian restaurant in Washington.

Developing story, check back for updates.