  We investigate the production of gamma-rays in the inverse Compton (IC)
scattering process by leptons accelerated inside relativistic blobs in jets of
active galactic nuclei. Leptons are injected homogeneously inside the spherical
blob and initiate IC $e^\pm$ pair cascade in the synchrotron radiation
(produced by the same population of leptons, SSC model), provided that the
optical depth for gamma-rays is larger than unity. It is shown that for likely
parameters internal absorption of gamma-rays has to be important. We suggest
that new type of blazars might be discovered by the future simultaneous X-ray
and $\gamma$-ray observations, showing peak emissions in the hard X-rays, and
in the GeV $\gamma$-rays. Moreover, the considered scenario might be also
responsible for the orphan X-ray flares recently reported from BL Lac type
active galaxies.
