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The EGRET experiment aboard the Compton Gamma-Ray Observatory (CGRO) hasobserved at energies above 100 MeV strong gamma-ray flares with short-term timevariability from the gamma-ray blazars 3C 279 and PKS 1622-297. During theseflaring periods both blazars have been detected by the COMPTEL experimentaboard CGRO at photon energies of about 10 MeV, revealing simultaneousgamma-ray activity down to these energies. For both cases the derived fluxesexceed those measured in previous observations, and 3C 279 shows an indicationfor time variability within the observational period. Both sources showevidence for `hard' MeV spectra. In general the behaviour of both sources atgamma-ray energies is found to be quite similar supporting the conclusion thatthe underlying physical mechanism for both gamma-ray flares might be the same.Comment: 5 pages, 4 postscript figures, latex, aipproc.sty, aipproc.cls, to  apear in: "Proceedings of the Fourth Compton Symposium," 1997, eds. C. D.  Dermer, M. S. Strickmann, and J. D. Kurfess, AIP Conf. Proc. 410 (New York:  AIP

Evidence for γ-ray flares in 3C 279 and PKS 1622-297 at ∼10 MeV