Using data from the COMPTEL telescope on board the Compton Gamma-Ray O
bservatory (CGRO) we have discovered an unidentified source at 1 simil
ar or equal to 165 degrees and b similar or equal to 57 degrees (error
region of similar to 1 degrees radius) in the energy range 0.75-3.00
MeV. The source was found in data from Phase 1 and Phase 2 (June 28, 1
991 - July 27, 1993) of the observation program of CGRO. The overall d
etection significance is above 8 sigma for the combination of seven vi
ewing periods. There is an indication of flux variability between June
1991 and July 1993. As a counterpart a number of sources are consider
ed, among them AGN, radio and X-ray sources, neutron stars and high-ve
locity clouds.