The BBC reported that there is "no hard evidence so far" linking airline bomb threats in Europe to Russia, Iran or any proxy groups. The broadcaster's report, which asks in its headline Who could be behind hoax bomb threats to European air travel?, was published on November 5.
According to the BBC, the question of who is responsible remains open. Its summary names three possibilities, Russia, Iran and proxy groups, and states that none has been tied to the threats by hard evidence at this point. The summary does not say which airlines, airports or countries were affected, and it does not identify any person or group connected to the threats.
The qualifier "so far" in the BBC summary indicates that the assessment reflects the information available at publication rather than a final finding. The summary does not say what additional information, if any, would bear on that assessment.
The BBC's headline describes the threats as hoaxes, a term the summary does not explain. Nothing in the summary indicates how the threats were delivered or how many were made.
Russia, Iran and proxy groups appear in the BBC summary as the subjects of the question, not as established findings. The summary's only assessment is that there is no hard evidence linking airline bomb threats to them.
This account is drawn from the BBC's published headline and summary, which are the only details available for this report. Further detail in the BBC's full article is not reflected here.
Sources: BBC News: Who could be behind hoax bomb threats to European air travel?.