The coins featured a cross which, according to the museum’s statement, indicated that the coins are from late within King Bluetooth’s rule.
The fleet of Russian "ghost ships" includes both military and civilian ships and reportedly has the goal planning acts of sabotage against the Nordic nations.
The inscribed disk was part of the Vindelev Hoard, a trove containing some 2.2 pounds of gold, large medallions and Roman coins made into jewelry.
It was not immediately known who was behind the incident, a police spokesperson said.
Citing unidentified sources, a Pulitzer Prize-winning journalist said that US navy divers deliberately destroyed the pipelines with explosives.
The suspects were reportedly planning terror attacks on several consulates and places of Christian and Jewish worship.
Researchers analyzed data of siblings born in Denmark between 1986 and 2003 in the study, of which 1.2 million were born during this period, of which nearly 800 thousand had at least one sibling.