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Context. A short duration burst reminiscent of a soft gamma-rayrepeater/anomalous X-ray pulsar behaviour was detected in the direction of LS I+61 303 by the Swift satellite. While the association with this well knowngamma-ray binary is likely, a different origin cannot be excluded.  Aims. We explore the error box of this unexpected flaring event and establishthe radio, near-infrared and X-ray sources in our search for any peculiaralternative counterpart.  Methods. We carried out a combined analysis of archive Very Large Array radiodata of LS I +61 303 sensitive to both compact and extended emission. We alsoreanalysed previous near infrared observations with the 3.5 m telescope of theCentro Astronomico Hispano Aleman and X-ray observations with the Chandrasatellite.  Results. Our deep radio maps of the LS I +61 303 environment represent asignificant advancement on previous work and 16 compact radio sources in the LSI +61 303 vicinity are detected. For some detections, we also identify nearinfrared and X-ray counterparts. Extended emission features in the field arealso detected and confirmed. The possible connection of some of these sourceswith the observed flaring event is considered. Based on these data, we areunable to claim a clear association between the Swift-BAT flare and any of thesources reported here. However, this study represents the most sophisticatedattempt to determine possible alternative counterparts other than LS I +61 303.

Candidate counterparts to the soft gamma-ray flare in the direction of LS I +61303