  We present the results of a new analysis of the data of the MiniBooNE
experiment taking into account the additional background of photons. MiniBooNE
normalises the rate of photon production to the measured $\pi^0$ production
rate. We study neutral current (NC) neutrino-induced $\pi^0$/photon production
($\nu_\mu + A \to \nu_\mu +1\pi^0 / \gamma + X$) on carbon nucleus (A=12). Our
conclusion is based on experimental data for photon-nucleus interactions from
the A2 collaboration at the Mainz MAMI accelerator. We work in the
approximation that decays of the intermediate states (non-resonant N, $\Delta$
resonance, higher resonances) unaffected by its production channel, via photon
or Z boson. $1\pi^0+X$ production scales as A$^{2/3}$, the surface area of the
nucleus. Meanwhile the photons incoherently created in intermediate states
decays will leave the nucleus, and that cross section will be proportional to
the atomic number of the nucleus. We also took into account the coherent
emission of photons. We show that the new photon background can explain part of
the MiniBooNE low-energy excess, thus significantly lowering the number of
unexplained MiniBooNE electron-like events from $5.1\sigma$ to $3.6\sigma$.
