Four Saudi nationals have filed a breach-of-contract lawsuit in federal court in Connecticut accusing a relative and managing member of an investment company of not securing opportunities for them and not returning $1.5 million they placed with the firm.

The nine-page lawsuit, filed Wednesday in U.S. District Court for the District of Connecticut in Bridgeport, asserts that Glenville, Connecticut, resident Faris Alnablusi did not properly follow up securing investment prospects in the Middle East and North Africa. Plaintiffs Meshal Alsudairy, Elham Alazab, Sarah Alsudairy and Reema Alsudairy said they are owed the $1.5 million they invested in the Colorado-based Worthbridge International LLC.