 After the convoy was blocked by the Sri Lanka Navy, India instead chose to airdrop supplies to the besieged city in a mission codenamed Operation Poomalai.Following the successful completion of the mission, and faced with the possibility of further involvement of the Indian military, including reports that Indian ground forces were being prepared for possible involvement in Sri Lanka, Sri Lanka President J. R. Jayewardene held talks with the Indian government to resolve the dispute.As a result of the negotiations, the siege of Jaffna was lifted and the Indo-Sri-Lankan accord was signed on July 29, 1987.