ИСТИНА

Since 2007 when the first FRB event has been anounced, many theoretical models explaining these enigmatic transients were proposed. After discovery of an FRB-like radio flare from a Galactic soft gamma-ray repeator accompanied by a high-energy burst, the focus of theoretical studies is on magnetars. Still, there are many unsolved problems in the framework of the magnetar scenario. From the point of view of the emission mechanism, two main possibilities are discussed: a magnetospheric emission and radiation from a relativistic shock. In the talk I review both approaches and discuss their connections to the whole set of data on FRBs, including repetition, periodicity, spectral and polarization measurements, and population aspects.