Kuwait reported that three of its border posts and an offshore oil drilling platform were attacked, causing infrastructure damage and injuring at least one worker. The incidents occurred in the country’s northern region and in Kuwaiti territorial waters, according to a statement from the Ministry of Defense cited by Al Jazeera.

The ministry described the assaults on the three land border centers as “criminal attacks.” The offshore platform, operated by Kuwait Oil Company, was struck by a drone, leading to one worker being injured. Authorities have not yet identified who was responsible for the attacks.

Kuwaiti officials have launched an investigation into the incidents to determine the source and motive behind the attacks.