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The Baikal Gigaton Volume Detector is a neutrino telescope of a km 3 scale currently under construction in lake Baikal. Baikal-GVD participates in the international multi-messenger program at earlier stages of its construction. Since autumn 2020 Baikal-GVD follows up of the IceCube neutrino astrotracks. Recent results of fast follow-up searches for time-and-direction correlation of Baikal-GVD high-energy cascades with IceCube GCN messages are presented.

Baikal-GVD is a cubic kilometer scale neutrino telescope being constructed in Lake Baikal. In 2022 it consists of 2880 optical modules attached to 80 vertical strings. Detection of neutrinos is based on detection of the Cherenkov radiation emitted by the products of neutrino interactions. In this contribution, development of the double cascade reconstruction technique is described. The first event rate estimation from Monte Carlo simulations of tau neutrino double cascade events as well as the background event rates are presented. *** 27th European Cosmic Ray Symposium -ECRS *** *** 25-29 July 2022 *** *** Nijmegen, the Netherlands *** * Speaker

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