While most Tamil militant groups laid down their weapons and agreed to seek a peaceful solution to the conflict, the LTTE refused to disarm its fighters. Keen to ensure the success of the accord, the IPKF then tried to demobilize the LTTE by force and ended up in full-scale conflict with them. The three-year-long conflict was also marked by the IPKF being accused of committing various abuses by many human rights groups as well as some within the Indian media. The IPKF also soon met stiff opposition from the Tamils. Simultaneously, nationalist sentiment led many Sinhalese to oppose the continued Indian presence in Sri Lanka. These led to the Sri Lankan government's call for India to quit the island, and the government allegedly entered into a secret deal with the LTTE that culminated in a cease-fire. However, the LTTE and IPKF continued to have frequent clashes. In April 1989 the Ranasinghe Premadasa government ordered the Sri Lanka army to clandestinely hand over arms consignments to the LTTE to fight the IPKF and its proxy Tamil National Army (TNA). Although casualties among the IPKF mounted, and calls for the withdrawal of the IPKF from both sides of the Sri Lankan conflict grew, Gandhi refused to remove the IPKF from Sri Lanka. However, following his defeat in Indian parliamentary elections in December 1989, new Prime Minister V.P. Singh ordered the withdrawal of the IPKF, and their last ship left Sri Lanka on 24 March 1990. The 32-month presence of the IPKF in Sri Lanka resulted in the deaths of 1200 Indian soldiers and over 5000 Sri Lankans. The cost for the Indian government was estimated at over ₹10.3 billion.