Investing.com -- Senator Elizabeth Warren has sent a letter to Defense Secretary Pete Hegseth requesting information about Department of Defense contracts awarded to drone company Unusual Machines, her office said Wednesday.

The Massachusetts senator asked Hegseth to explain the criteria used to award Unusual Machines a $12.8 million Pentagon contract. Warren noted in the letter that Donald Trump Jr. reportedly holds a multimillion-dollar stake in the company and serves on its advisory board.

Warren requested a list of each Department of Defense contract awarded to Unusual Machines, according to the letter.