The Tamil Nadu police asked state BJP chief K Annamalai to stop spreading rumours and mentioned that there has been no delay in transferring the case to the NIA.
The two-day 'Chintan Shivir' or brainstorming session of state Home Ministers and top police officers from all states, concluded on Friday with a commitment to move towards a "thematic approach".
Besides this, Vishva Hindu Parishad general secretary Sthanumalayan is likely to visit the blast spot tomorrow and he is also likely to interact with the media thereafter, according to the sources.
The National Investigation Agency arrested former state secretary of PFI CA Raoof last night from his house in Palakkad district. He was absconding after the Central Government banned PFI.
Questioning Stalin over the incident, Annamalai asked why was the state government "caught napping" when there was a "specific threat alert" flagged by the central agencies five days ahead of the blast.
Union Home Minister Amit Shah during his visit to Surajkund, Haryana announced to open branches of National Investigation Agency (NIA) in all states across the country by 2024 as part of the Centre's plan to build an anti-terrorism network.
The NIA registered the case after the Counter Terrorism and Counter Radicalization (CTCR) division of the Ministry of Home Affairs (MHA) issued an order asking the anti-terror agency to start probing into the case.
The Counter-Terrorism and Counter Radicalization (CTCR) division of the Ministry of Home Affairs (MHA) issued the order a day after Tamil Nadu Chief Minister MK Stalin recommended for NIA probe in the Coimbatore blast case.