A group of top House Republicans wrote to Harvard University on Monday, questioning the school about alleged work on research funded by the Iranian government, as well as members of the Chinese government.

The letter accuses Harvard researchers of working with Chinese academics on research funded by the Iranian National Science Foundation, an entity chartered by the Iranian government and ultimately controlled by the Iranian supreme leader.

It states that such work occurred at least four times since 2020, as recently as last year.

The letter was signed by Reps. John Moolenaar (R-MI), Tim Walberg (R-MI) and Elise Stefanik (R-NY). Moolenaar is the chair of the Select Committee on the Chinese Communist Party, Walberg chairs the Education and Workforce Committee and Stefanik is the chair of House Republican Leadership.

“As you may know, under the Iranian Transactions and Sanctions Regulations, the Office of Foreign Assets Control has specifically disallowed transactions incident to publication when they involve the Iranian government and its instrumentalities,” the letter reads. “This funding from an Iranian government agent raises serious concerns and may violate U.S. law.”

The lawmakers emphasized that the 2024 research took place following the imposition of wide-ranging U.S. sanctions on Iran, after Iranian proxies killed U.S. servicemembers and in the midst of intense U.S. government attention on Iran’s malign activities.

They requested a list of all collaborations between Harvard affiliates and anyone receiving funding from the Iranian government or Iranian government entities.

The letter as a whole focuses primarily on alleged connections between Harvard and Chinese researchers and programs, characterizing such work as a national security threat. 

Harvard did not immediately respond to a request for comment.