Uncertainty Surrounds Nord Stream Explosion Perpetrator, Say Swedish Investigators

Swedish investigators have said it will be "difficult" to confirm who was behind last year's attacks on the Nord Stream gas pipelines in the Baltic Sea. The incident, which caused severe damage, spawned several theories as to the identity and allegiance of the culprits, with Russia, the US and a pro-Ukrainian group all alleged to have been involved. Swedish authorities have previously confirmed it was a deliberate act of sabotage. Two of the gas leaks occurred in waters within Sweden's exclusive economic zone, prompting the country's investigation.