Night watchman's Kumburgaz videos over the Sea of Marmara
- When
- Where
- Kumburgaz, Turkey
- Sources
- 2 public sources

Night watchman Yalcin Yalman said he filmed about 30 videos of lit objects over the Sea of Marmara near Kumburgaz between 2007 and 2009, promoted by the Sirius UFO group. Claims that Turkish scientists authenticated them are poorly sourced; skeptics suggest reflections or a hoax.