Object M: The buried Estonian mystery the KGB spent years trying to reach | Reality Check

The source examines the Merivalja object, described as a buried structure beneath a garden in Estonia, Tallinn, Merivalja. Ross Coulthart said that Virgo Mitt struck metal while digging a well and that fragments were later tested.¹ Mart Sander said that the object was first dug up in 1969.² Ross Coulthart said that Soviet scientists, researchers, Committee for State Security (KGB) agents and military personnel investigated it for around ten years.³ Soviet investigators reportedly described it as an oval metal object about 15 metres long and weighing 200 tonnes, partly beneath the house and extending into the garden.⁴ Ross Coulthart also said that an attempted excavation in the 1980s was halted after a worker reportedly received a blow from the object.⁵

The account presents the material evidence as incomplete and disputed. Sander said that only fragments of the supposed outer layer had been recovered,⁶ while later tests, conducted between 2012 and 2017, produced results different from those of the 1980s and left researchers uncertain whether the original pieces had been tested.⁷ Coulthart said that the KGB became involved and marked its files “sovacheno sekretno”, meaning completely secret.⁸ The source also profiles Alexander Deyev, whom Coulthart described as an aviation engineer with ties to the Soviet Defense Ministry.⁹ Coulthart said that Deyev established a laboratory above the object and allegedly used D-generators, including a smoky glass orb (D field generator), in an attempt to bring it to the surface.¹⁰ Sander described Deyev as claiming telepathic contact with non-human objects.¹¹

The source emphasises the limits of the available record. Coulthart said that no photograph of the actual object had been produced and that the Soviet excavation team never reached it.¹² The 1991 Japanese investigation of the Merivalja garden reportedly used ground-penetrating radar and electromagnetic sensing,¹³ but Coulthart said there is no published record of its findings.¹⁴ Sander said that research groups have proposed natural, man-made and intermediate explanations for the object.¹⁵ The source therefore matters as a record of competing claims, investigative activity and evidential uncertainty surrounding a prominent Estonian UAP-associated mystery.