The Indian prime minister, Narendra Modi, is to visit Sri Lanka from June 8 - 9 along side the Maldives, the country's External Affairs Ministry said today.
India's foreign secretary Vijay Gokhale said the visit was intended to send "a very clear message of solidarity" following the Easter Sunday suicide bombings by Islamist extremists.
His visit would make Modi the first foreign leader to visit the island since the attacks.
Modi is expected to hold talks with not only Sri Lanka's president and prime minister, but also the Leader of the opposition, Mahinda Rajapaksa, the Business Standard reports.
Over 250 people were killed when suicide bombers supportive of Islamic State detonated devices at luxury hotels and churches on Easter Sunday.
St Anthony's Church, Colombo
There has been increasing criticism over the government's failure to take action to prevent the attacks after it emerged India had warned Sri Lankan authorities repeatedly in the preceding weeks that such an incident was planned.
Questions have also been raised over the organisations' links with government security forces and intelligence, with reports that the intelligence authorities funded NTJ.
Last month a Sri Lankan parliamentarian said the former defence secretary Gotabaya Rajapaksa gave NTJ land for an office in Colombo.
Kurunegala District UNP MP Thushara Indunil however claimed that the NTJ received support from Rajapaksa, who announced that he would the running for president in elections set to be held later this year.
Indunil said the All Ceylon Jamiyathul Ulema had warned the Sri Lankan government “as early as 2014” about the emergence of the NTJ and Islamic extremists on the island. “If the former Defence Secretary was privy to this information, we ask of what he did then, knowing the threats it posed,” he said.
“He tried to divide the peaceful community of Muslims into two. He knew that it would help him in his political endeavours which is why he strengthened one group against the other. Basil Rajapaksa said that there are 200 such mosques and the defence secretary assisted in setting them up.”
One Sri Lankan soldier is currently on the run after authorities said they believed he had taught the attackers how to use explosives.
Cabinet spokesperson Rajitha Senaratne said that at least four army officers were involved in organising the assassination of police officers in Batticaloa last year, and claimed dozens of NTJ were on the payroll of Sri Lankan intelligence linked to Rajapaksa.