One person was detained from outside the High Commission of Pakistan here on Friday, where Pakistan National Day was being celebrated.
The arrested person has been identified as Mohammad Hassan Antu with separatist leanings.
However, no separatist leader was seen inside the High Commission of Pakistan during the event.
Pakistan High Commissioner to India Sohail Mahmood, during the event, said that Kashmir is an important issue between the two neighbouring countries.
Earlier in the day, Ministry of External Affairs spokesperson Raveesh Kumar during the weekly press briefing on Friday confirmed that India has decided not to send any representative to attend the Pakistan National Day.
"The decision was taken after Pakistan High Commission decided to call Hurriyat leader to the reception. In February we were very clear, any attempt by Pakistan High Commission or Pakistani leadership to engage with Hurriyat leaders will not be taken lightly," he had added.
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Pakistan Day is celebrated to mark the Lahore Resolution on March 23 each year. The Lahore Resolution, which is also called Pakistan Resolution, passed on March 23, 1940, is considered a major milestone in the Muslim struggle for an independent Muslim state which was later called Pakistan.
India, time and again, has always objected to Pakistan's engagement with the separatist leaders.