IANS quoted intelligence sources as saying Gupta, 53, had been to Sunderbani, close to the Line of Control (LoC) in Rajouri district, for two days on March 28 and 29 this year.
According to Kashmir Media Service, officials said that they do not have exact information on the kind of relationship the diplomat had with the doctor couple.
"At some stage, it might be investigated," intelligence official, said.
Gupta, a second secretary with the Indian High Commission in Islamabad, has been remanded to police custody. The Indian government on Tuesday said that it was questioning Gupta for passing sensitive information to Pakistan.
She was arrested four days ago after being summoned to Delhi on the pretext of consultations.
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