( CNN) The US Coast Guard is searching for survivors after detecting what is believed to be airplane dust 15 miles east of an island in the Bahamas on Tuesday.

The Coast Guard had been searching for an airplane with four Americans aboard that was reported missing Monday.

On board were Jennifer Blumin, 40, from New York City, Nathan Ulrich, 52, from Lee, New Hampshire; and Blumin’s 3-year-old and 4-year-old sons.