A Ministry of External Affairs spokesperson said that the team has not yet asked for approval to visit the island.
On June 25, UN Human Rights High Commissioner Navy Pillay announced the three member expert team which would advise and support a team of 12 UNHRC staff.
The experts are, Martti Ahtisaari, former President of Finland and Nobel Peace Prize Laureate, Silvia Cartwright, a former Governor-General and High Court judge of New Zealand, and Jahangir, former President of Pakistan's Supreme Court Bar Association and of the Human Rights Commission of Pakistan, according to a UN statement.
The team will be operational for 10 months upto mid April 2015 and will look into alleged serious violations and abuses of human rights and related crimes by the Sri Lankan Army and the LTTE during the last years of the armed conflict that ended in 2009.
Also Read
Up to 40,000 Tamil civilians were killed in the last months of the brutal civil war in 2009, rights groups and experts have alleged.
The panel's appointment was the result of the US-backed resolution at the UNHRC session in Geneva in March, where the UN endorsed Pillay's recommendation for an external probe into serious violations and abuses of human rights in Sri Lanka.
The parliament also passed a government backed resolution not to allow the UNHRC team into the country.
The UN said it was encouraging the government of Sri Lanka to fully cooperate with the investigation which can help shed light on the truth and advance accountability and reconciliation in Sri Lanka.