Two 17th century paintings were discovered dumped in a roadside skip in Germany, prompting German police to issue an appeal for information.
A man found the paintings at a motorway service station in Bavaria last month, BBC reported.
He delivered the artwork to police in the city of Cologne and no one has come forward to claim the artwork.
Police said the oil paintings are believed to have been by Dutch artist Samuel van Hoogstraten and Italian artist Pietro Bellotti.
One of the portraits is undated and of a boy wearing a red hat, presumably painted by Samuel van Hoogstraten — a painter and writer who lived in the Netherlands between 1627 and 1678.
The other consisted of a smiling self-portrait by Pietro Bellotti, a lesser-known Italian painter who lived from 1625 to 1700.
An art expert concluded that the two framed paintings were originals via initial assessments.
Police in Cologne are appealing for anyone who recognizes the artwork or knows how they ended up in the roadside skip to come forward.
Auction listings websites say Hoogstraten's artworks have fetched large sums.
Dated to the 1600s, one Hoogstraten artwork of a shepherdess resting beneath a tree sold for £50,062 at the Bonhams auction house in London in 2019.
Another, called La Crucifixion, was sold for £285,285 in 2018.