The incident took place around 5.30 PM when the duo, present at the launch of a book 'Ladakh -- my journey up, down and across' authored by bureaucrat late Pushkernath Kaul, raised notebook-sized placards in favour of Kashmiri Pandits, a senior police official said.
The duo, a man and a woman, were whisked away by security personnel at the event in New Delhi area and later detained by the police. However, the event continued.
At the event, Abdullah said, "We need to move forward and find an amicable solution to all the issues between India and Pakistan."
On Kashmiri Pandits, he said his stand is clear that they must return to their native place.
Later, he asked Delhi Police to release the two saying "they are like his own children".