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3C 345 is one of the archetypical active galactic nuclei, showing structuraland flux variability on parsec scales near a compact unresolved radio core.During the last 2 years, the source has been undergoing a period of highactivity visible in the broad spectral range, from radio through high-energybands. We have been monitoring parsec-scale radio emission in 3C 345 duringthis period at monthly intervals, using the VLBA at 15, 24, and 43 GHz. Ourradio observations are compared with gamma-ray emission detected by Fermi-LATin the region including 3C 345 (1FGL J1642.5+3947). Three distinct gamma-rayevents observed in this region are associated with the propagation ofrelativistic plasma condensations inside the radio jet of 3C 345. We report onevidence for the gamma-rays to be produced in a region of the jet of up to 40pc (de-projected) in extent. This suggests the synchrotron self-Compton processas the most likely mechanism for production of gamma-rays in the source.

Radio Flaring Activity of 3C 345 and its Connection to Gamma-ray Emission