Azerbaijan’s embassies around the world are “less diplomatic missions and more ATMs”, the Armenian National Committee of America (ANCA) said in a tweet on Tuesday, referring to an ongoing investigation involving American businessmen and Azerbaijan.

“Increasingly clear that Azerbaijan’s embassies around the world are less diplomatic missions and more ATMs – cash machines delivering illegal bribes at Aliyev’s direction,” the ANCA tweeted.

The FBI raided Democratic Congressman Henry Cuellar's home and campaign office in Texas last Wednesday as part of a wide-ranging federal probe relating to Azerbaijan and several U.S. businessmen, a source familiar with the matter told ABC News.

Cuellar, who represents Texas' 28th Congressional District along the U.S.-Mexico border, has been in Congress since 2005. In recent years he has served as a co-chair of the Congressional Azerbaijan Caucus, and repeatedly met with Azerbaijan officials, including the ambassador of Azerbaijan, Elin Suleymanov.