Multi-messenger searches with the ANTARES and KM3NeT neutrino telescopes

The year 2017 brought important breakthroughs to the astro-particle community, the firstdetection of an electromagnetic counterpart of the gravitational wave signal from a binaryneutron star merger and the potential correlation between high-energy neutrinos observed by theIceCube telescope and the flaring blazar TXS 0506+056. These observations have opened a newway to probe extreme phenomena in the sky. Combination of these messengers is now possibleand fundamental information can be obtained with these new probes.The ANTARES neutrino telescope has been operating for more than ten years in the Mediter-ranean sea with the purpose of searching for high energy cosmic neutrinos. During the last fewyears the multi-messenger approach has delivered intriguing new results for Cherenkov neutrinodetectors with promising potential for future astrophysical searches. Thus, the ANTARES Col-laboration is actively participating to the follow up of alerts sent by different experiments cover-ing the full electromagnetic spectrum, IceCube and the gravitational-wave interferometers. Thisallows probe the potential neutrino emission from various sources, including fast radio bursts,gamma-ray bursts, binary mergers and blazars. ANTARES also sends alerts that lead to an elec-tromagnetic follow-up of interesting neutrino events. The latest results will be discussed in thefollowing.