"It is regrettable that neither the Chief Minister nor his ministers have time to visit the families of the slain teenager in Gaya and that of a journalist in Siwan district," he said in a statement resenting Kumar's visit to Varanasi and Lucknow.
Referring to the Rajdeo Ranjan murder case, Modi alleged that fingers were being pointed at incarcerated former RJD MP Mohammed Shahabuddin.
45-year-old Ranjan was instrumental in the release of a video in which Shahabuddin was seen meeting RJD minister Abdul Gafoor and another leader a couple of months back.
Alleging that there was a pattern in the murder case, Modi recalled that a BJP MP's spokesperson Srikant Bharti too was also gunned down by unidentified assailants in Siwan district in November, 2014.
The RJD, a part of the ruling Grand Alliance government in Bihar, had recently nominated Shahabuddin as a member of its national executive.