Kartarpur is located in Pakistan's Narowal district across the Ravi River (File Photo)

Prime Minister Narendra Modi, in a letter written in response to a congratulatory message by his Pakistani counterpart Imran Khan, has called for "early operationalisation of the Kartarpur corridor which is functional all the year round", according the Ministry of External Affairs.

The letter from PM Modi was sent to Mr Khan on June 12, the foreign ministry said.

"The letter was written by Prime Minister Narendra Modi to Imran Khan. In that, there was mention of the Kartarpur corridor and he had written ''we will continue to work for early operationalisation of Kartarpur corridor which is functional all year round''," Ministry of External Affairs Spokesperson Raveesh Kumar said in response to a question at a media briefing.

The current status is that there have been three technical-level discussions, and clarifications from the Pakistani side have been sought, he said, adding India is awaiting a response.

The Indian government is committed to building of the corridor as it is a long-pending demand of the pilgrims and "we will take the steps that we have to in order to complete this", Mr Kumar said.

In November 2018, India and Pakistan had agreed to set up the border crossing linking Gurdwara Darbar Sahib in Kartarpur, the final resting place of Sikh faith founder Guru Nanak, to Dera Baba Nanak in Gurdaspur district.

Kartarpur is located in Pakistan's Narowal district across the Ravi River, about 4 km from Dera Baba Nanak.

The first meeting to finalise the modalities for the corridor took place on the Indian side of the Attari-Wagah border on March 14.

Technical experts of the two countries met on March 19 during which alignment, coordinates and several other engineering aspects of the proposed corridor were discussed.

However on March 29, India conveyed its strong concerns to Pakistan over the presence of a leading Khalistani separatist in a committee appointed by Islamabad on the Kartarpur project.

India also postponed a previously agreed meeting on the project which was to be held on April 2 in Wagah on the Pakistani side.

On May 27, officials from Pakistan and India held a meeting to discuss the modalities for the corridor.

Vice President M Venkaiah Naidu and Punjab Chief Minister Amarinder Singh had on November 26 last year laid the foundation stone of the Kartarpur corridor in Gurdaspur district. Two days later, Pakistan's Prime Minister Imran Khan laid the foundation stone of the corridor in Narowal, 125 km from Lahore.