  Recently the IceCube collaboration and 15 other collaborations reported the
spatial and temporal coincidence between the neutrino event IceCube-170922A and
the radio-TeV activity of the blazar TXS 0506+056. Their further analysis on
9.5 years of IceCube data discovered neutrino flare between September 2014 and
March 2015, when TXS 0506+056 is however in "quiescent" state. We analyze the
Fermi-LAT data in that direction, and find another bright GeV source PKS
0502+049, which is at an angle of $1.2^{\circ}$ from TXS 0506+056, with strong
activties during the neutrino flare. No other bright GeV source was detected in
the region of interest. Though PKS 0502+049 is $1.2^\circ$ separated from TXS
0506+056, it locates within the directional reconstruction uncertainties of 7
neutrinos, out of the 13 neutrino events during the neutrino flare. Together
with the observed high flux of the $\gamma$-ray flare, it may be unreasonable
to fully discard the (partial) contribution of PKS 0502+049 to the neutrino
flare. The single source assumption used in the neutrino data analysis might
need to be revisited.

High Energy Astrophysical Phenomena