Airport disruption
Unresolved drone alarm temporarily closes Stockholm Arlanda Airport
Sigtuna, Stockholm County, Sweden09 Sep 2024 · event dateapproximate location You are viewing revision 1 as published on 15 Oct 2026. The dossier text, evidence states, claims and sources of this revision are fixed; catalogue context such as cost estimates is not shown here. View the current version
A suspected-drone alarm interrupted flights at Stockholm Arlanda Airport overnight on 9 September 2024. Police later closed the investigations without establishing whether drones were present.
Drone presenceInconclusive[1][3] AttributionNot established
Claims and evidence
3 sources · 3 original statements
Sources that repeat the same original statement count once: a number of articles is not a number of independent confirmations.
| Claim | Original source | Assessment |
|---|
| Impact SVT reports reopening at03:30 local time. Source passage [1]“03.30 kunde Arlanda öppna igen.” Passage checked word for word against the source on 15 Oct 2026. | Airport operations reported by SVT via SVT | supports Literal short passage checked in the original source; no independent confirmation inferred from republication. |
| Impact Swedavia says normal traffic resumed without daytime delays. Source passage [2]“Enligt Swedavia ska det här inte leda till några förseningar under dagen” Passage checked word for word against the source on 15 Oct 2026. | Swedavia via TV4 | supports Literal short passage checked in the original source; no independent confirmation inferred from republication. |
| Drone Police say there is no basis to continue the investigation. Source passage [3]“Det finns helt enkelt inget att ta på, inget vi kan jobba vidare med” Passage checked word for word against the source on 15 Oct 2026. | Swedish Police speaking directly to SVT via SVT | context only Literal short passage checked in the original source; no independent confirmation inferred from republication. |
Source genealogy
Grouped by recorded original statement, not by publisher. Unmapped sources have unknown dependency; linked statements may also share an earlier origin. This is not an independence score.
- Airport operations reported by SVT
- SVT: Arlanda closure; article updated16September [1] · Relayed statement
- Swedavia
- TV4: alarm and airport operator account [2] · Relayed statement
- Swedish Police speaking directly to SVT
- SVT: all Arlanda investigations closed; police directly interviewed [3] · Relayed statement
Show source graph
Left: publishers; right: recorded original statement. Converging lines show shared origin, not publication order. Dashed nodes have unknown dependency.
What we know
SVT reports closure around 02:00 and reopening at 03:30 local time, with five flights affected. TV 4 describes observations around 01:00 followed by immediate closure, also giving 03:30 reopening. The start time and diversion count differ; no exact duration is asserted.
The airport operator Swedavia separately confirms operational recovery through TV 4. Police directly tell SVT that the investigations lack a basis to continue; SVT says object identity remains unclear. The replacement follow-up supports inconclusive, not a proven star, aircraft or hoax. Multiple articles repeating police do not independently identify a drone.
What remains unknown
This dossier concerns the first overnight closure, not subsequent alarms on later evenings. Drone identity, count, operator and motive remain unresolved. The displayed point represents Sigtuna municipality, not an airport or drone coordinate.
Operator attribution: Not established. No operator or responsible organisation established by these sources; no criminal charge or conviction is asserted.
How the story changed
A reported sighting or alarm led to the documented airport restriction; see the source-bound claims and uncertainty below. [1]
Editorial changes
- Revision 1 · 15 Oct 2026Curated dossier created after checking the cited sources line by line.
Cite this dossier
Permanent page · Revision 1
Chicago
DroneLedger. “Unresolved drone alarm temporarily closes Stockholm Arlanda Airport.” Dossier arlanda-airport-alarm-2024-09-09, revision 1, updated 15 Oct 2026. https://droneincidents.com/incident/arlanda-airport-alarm-2024-09-09/v1/
APA
DroneLedger. (15 Oct 2026). Unresolved drone alarm temporarily closes Stockholm Arlanda Airport (Dossier arlanda-airport-alarm-2024-09-09, revision 1). https://droneincidents.com/incident/arlanda-airport-alarm-2024-09-09/v1/
Dataset DOI: 10.5281/zenodo.23345422
Cite the revision you used: later revisions may change evidence states.
Curated dossier · sources checked line by line on 15 Oct 2026
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