The crisis was not long in coming. In January 1987, Sri Lankan military started a new offensive, putting the Tamil city Jaffna under martial law. The entire Tamil north was put under embargo, stopping supplies of even essential like food and medicine and creating famine-like conditions. The government also started using its newly-acquired air power for air strikes. Undoubtedly, these were highly brutal tactics, causing incalculable harm to the innocent Tamil civilians.
While Indian government sought to defuse the situation, both LTTE and Colombo kept escalating it by attack and counter-attack. By May, the situation had become intolerable. Faced with growing pro-Tamil sympathy at home, Gandhi decided to issue an ultimatum. Jayewardene was demanded by India to end the military offensive. But the Sri Lankan president was ready to call Gandhi’s bluff. “India can go to hell,” he told his advisers. When Indian diplomats stressed on their demands, he told his advisers, “what is the worse [sic] that India can do? It will invade Sri Lanka. I will cross that bridge when it comes.”
Given Jayewardene’s stubbornness, Gandhi was forced to take more drastic measures. On 2 June, the Sri Lankans were informed that in a few hours India will be unarmed ships carrying food and medicine for the embargoed Jaffna city. The Indian ships will be sailing through the Sri Lankan naval blockade and delivering the relief supplies to the distraught Tamils. However, by this point, Jayewardene was too committed to turn back. The nationalist Sinhalese population (including the Buddhist monasteries) were goading him on to take on the big Indian bully.