A type U burst was observed on 22 June 1998 with the WAVES radio receivers on the Wind spacecraft. It descended in frequency from 5 MHz to the turning frequency of about 1 MHz. It is extremely rare that a U burst is observed at such a low frequency, well out in the solar wind. Using a density model to convert frequency to radial distance we find that the radio emission started at 3 Ro, and that the electron stream turned back toward the Sun at about 8 Ro. The probable origin of the energetic electrons was in a B 6.8 X-ray flare that was coincident with the onset time of the U burst. A series of images by the LASCO coronagraph show a slow (214 km/s) CME in progress on the west limb whose front was at 9 Ro at the time of the U burst. As no stable magnetic loops exist at radial distances such as 8-9 Ro, we attribute the U burst to a stream of energetic electrons accelerated in an active region at the footpoint of one leg of the expanding arch of the CME. ¿ 1999 American Geophysical Union