From the London Mail [caution tabloid]:
Russia‘s mysterious ‘Doomsday Radio’ came to life on Monday, sending out two cryptic voice messages to unknown listeners. The Cold War-era shortwave station has been broadcasting a continuous, monotonous buzzing sound since the 1970s. Located about 18 miles from Moscow, it is believed to be part of a secret military communications network, possibly even a failsafe linked to Russia’s nuclear command system.
Today, the usual buzzing was interrupted twice with cryptic messages in Russian, consisting of numbers, names or codewords. Among them were ‘NZHTI,’ a call sign the station has used before, and ‘HOTEL,’ along with a string of numbers, 38, 965, 78, 58, 88, 37, which some speculated could represent coordinates.