Arrest of diplomat a serious issue: Krishna

"Investigations are going on and we will have to wait till the investigation are complete and then find out what was the motive and what was the modus operandi," Krishna told reporters here.

He said the fact that she was called and was in police custody shows the "seriousness" of the issue.

Madhuri Gupta, an IFS-B officer who was Second Secretary in the Indian High Commission in Islamabad, was arrested last week on the charges of passing information to ISI. She was summoned by Ministry of External Affairs on the pretext of discussions over SAARC summit, being held in Thimphu, official sources said.

"Let's first get through with the investigation that has been initiated.... MHA is doing the investigation. Once we get all the report, what needs to be done will be done by the government of India," he said.

Asked if the incident has brought the High Commission under the scanner, the minister said, "Let's not be judgmental and jump to any conclusion".