This is information worthy of a spy movie. Britain’s Defense Ministry said on Sunday it had launched an investigation after a member of the public discovered “sensitive” security-related documents.

“The Defense Ministry has been informed … of an incident in which a citizen found sensitive defense-related documents,” a spokesman said. “The ministry takes information security very seriously and an investigation has been launched,” he added.

According to BBCThese classified documents, some fifty pages in total, including emails and PowerPoint presentations, were found Tuesday morning behind a bus stop in Kent, southern England, in a soggy heap.

The Black Sea incident in question

These writings refer to various archives, according to the British channel. Some evoke a possible British military presence in Afghanistan after the departure of international forces. Others refer to the possible reaction of Russia to the passage, on Wednesday, of a Royal Navy ship, the HMS Defender, in the Black Sea, off the Crimea, Ukraine’s peninsula annexed by Russia in 2014.

The Russian army had claimed to have fired warning shots at the British destroyer. The British government had denied it, citing Russian “shooting exercises” and “an innocent passage through Ukrainian territorial waters.” However, according to documents discovered on the street, a possible aggressive response from Russia had been considered. “As the public would expect, the Defense Ministry is planning carefully,” which “includes an analysis of all potential factors affecting operational decisions,” said the spokesman for the case regarding HMS Defender.

A spokesman for the Defense Ministry said that an employee had reported the disappearance of these delicate documents. For the BBC, they could come from the office of a senior ministry official.