BJP National General Secretary P Muralidhar Rao on Thursday said National Investigation Agency (NIA) may have to get involved in actor Sushant Singh Rajput's death case as the case is getting bigger.

"Abetment of suicide, unnatural death are being investigated by Central Bureau of Investigation. Directorate of Enforcement (ED) is investigating Money laundering Narcotic Control Bureau (NCB) is investigating Drug use case under NDPS Act. NIA may have to get in - may be.!! Case is getting larger - Connecting different cases - web of networks," Rao tweeted.