Steve Neavling

 FBI agents are having a hard time investigating the killings of four Americans at a U.S. consulate in Libya because they can’t get clearance from the country’s leaders to enter the city of Benghazi, CNN reports.

Making matters worse, the crime scene has not been secured, according to CNN, citing sources.

Libya also has denied the FBI’s request to interview suspects in custody, CNN reported.

The attack on the consulate occurred during a protest over a film that mocked Muslim Prophet Mohammed.