Residents on the southwest side of Oklahoma City are trying to figure out what made a loud, roaring noise early Friday morning that interrupted their sleep for hours.

From about midnight to 2 a.m., News 9 received dozens of emails, phone calls and Facebook posts about the noise. People said it rattled windows and shook their homes.

Many compared the noise to a large jet engine, and the neighborhoods are near Will Rogers World Airport. However, News 9 checked with the FAA, and local police and fire dispatchers. No one knew what the source was. We attempted to contact Tinker Air Force Base, but our calls were not returned.