Also, 94 fresh cases pushed the state's tally to 4,420, it added.
The department said in a statement that the latest deaths were reported from Begusarai, Sheohar and Nawada districts.
It, however, did not provide details like age, sex, travel history and co-morbidities, if any, suffered by the deceased and whether they died before or after testing positive.
Of the 28 deaths, Khagaria and Begusarai account for three each followed by Patna, Vaishali, Siwan, Bhojpur and Sitamarhi (two each) and Munger, Rohtas, East Champaran, Nalanda, Samastipur, Saran, Bhagalpur, Jehanabad, Madhepura, Jamui, Sheohar and Nawada (one each).
Districts which have reported the highest number of COVID 19 cases are Patna (267), Khagaria (257), Begusarai (254), Rohtas (217), Madhubani (201), Bhagalpur (204), Jehanabad (173), Munger (159), Katihar (156).
COVID-19 cases have been reported from all 38 districts of the state.
Of the total 4,420 cases, 2,272 are active, 2,120 have recovered while 28 persons have died.
The number of samples tested till date is 88,313.
Although the state had reported its first case in March, more than 3,000 people tested positive in May, the spike attributed mainly to the influx of migrants by special trains and other modes of transport.
According to data released by the health department, the number of migrants who have tested positive since May 3 is 3,187. AR RG ABH ABH