British and Serbian police

One tonne of cocaine was seized aboard the Ares ship in Venezuelan waters.

Montenegrin nationals are arrested, the Montenegrin State Police Service said.

The Office points out that is a result of a multi-month international action initiated by the Montenegrin police in cooperation with the Dutch, British and Serbian police.

As pointed out in the Montenegrin Police Directorate, it is a several months-long international action initiated by Montenegrin police, in cooperation with Dutch, British and Serbian police.
The portal, along with photos of the ship, also cites the statement of the Police Directorate posted on twitter that a ton of cocaine was seized and Montenegrin citizens arrested.