Counter-terrorism investigators are investigating an arson attack at a suburban defence manufacturer and are hunting a far-left extremist group, after the group claims credit for the incident. Both outlets report that investigators believe the claimed responsibility aligns with the attack and are treating it as a matter requiring counter-terrorism scrutiny. The manufacturer is described as located in a suburban area, and the attack is characterized as arson. Authorities are reportedly working to verify the claim of responsibility and to determine the circumstances and parties involved. The coverage focuses on the ongoing police response, including the counter-terrorism tasking and investigative efforts to identify the individuals or group behind the fire. At this stage, the reports present the far-left group’s claim as a lead being pursued by investigators rather than a confirmed finding. No additional details about suspects, motives, extent of damage, or arrests are included in the provided summaries.