FRBs apparently from "...a “run-of-the-mill” magnetar. Astronomers labeled it SGR 1935+2154..." About 30,000 light years away.
The research paper is behind a paywall, but
Summary: FRB's source as Rail and/or Coil Guns (or mass drivers)
I've been studying rail and coil guns recently, and certain applications of this technology can result in some pretty high speeds with a significant amount of mass. I've been wondering if these FRB's could be a result of...
This appears to be a New Scientist scoop:
Fast Radio Burst Pinned Down to Giant Stellar Nursery
by Ken Croswell
A young neutron star is probably the source of a repeating signal previously tracked to a dwarf galaxy 2.4 billion light-years away.
Link: New Scientist