"His (UN chief's) good offices remain available should both sides agree," the Secretary-General's  Deputy Spokesman, Farhan Aziz Haq,  said in a statement.

"We welcome the news of the Pakistani authorities releasing the captive Indian pilot today," he said, referring to the release of Indian Air Force Wing Cmdr. Abhinandan Varthaman, whose war plane was shot down by Pakistani jets on Wednesday.

The decision to free the Indian pilot was announced on Thursday by Prime Minister Imran Khan as a "peace gesture" towards India, a move welcomed by nations around the world.

"The Secretary-General calls on both parties to sustain this positive momentum and engage in further constructive dialogue," Farhan Haq added.