'Though Pakistan is yet to take firm action on our dossiers, we are working with its government and other countries to prevent any type of terror attacks on India in future,' Krishna pointed out.

On his unscheduled stopover in Karachi late Thursday while returning to New Delhi from Dubai by an Emirates flight, Krishna said it was unpleasant and stressful to have been in the aircraft for more than six hours for reasons beyond anyone's control.

'They (airport officials) did not allow anyone to step out of the aircraft. I have no information whether they were aware that I was in the aircraft. As the Karachi airport was a re-fuelling hub for Emirates, I was assured by the airline that the aircraft would return to Dubai after re-fuelling,' Krishna recalled.

Inclement weather prevented the Emirates flight from landing in New Delhi and it was diverted to Karachi.

Krishna was returning to India after cutting short his four-day visit to Brazil where he participated in the ministerial meeting of India, Brazil and South Africa (IBSA) countries to finalise the agenda of the IBSA summit of heads of state in November.