The United States is waging a pressure campaign against the leading inter-American human rights watchdog to squash a potential investigation into illegal U.S. attacks on boats in the Caribbean Sea and the Pacific Ocean.

After a recent meeting of the Inter-American Commission on Human Rights, the State Department pushed the organization to shift its focus to other issues instead of the monthslong campaign of extrajudicial killings by the U.S. military.

Though the president of the IACHR disputes that the U.S. is pressuring his organization, the State Department responded to questions about the meeting with a statement urging the commission to move onto other matters. A past IACHR president said the organization may fear the “wrath” of the United States, which is the largest financial contributor to the commission’s parent organization, if it launches an investigation.

U.S. lawmakers and experts say an investigation by the IACHR could be an important mechanism to hold the Trump administration accountable for the lethal strikes. Scores of civilians have been killed in the campaign, which has seen families of victims petition the IACHR and sue the U.S. government, accusing it of wrongful death and extrajudicial killings.