Over 100 people in Ratlam in Madhya Pradesh fell ill after feasting at a marriage dinner, the second such incident in five days in the district, police said Thursday.
While 65 affected people were admitted to Ratlam district hospital, the rest were discharged after first aid, a hospital spokesman said.
Earlier, 35 people had fallen ill after eating at a marriage feast.
While many of those admitted to hospital are gastroenteritis patients, the possibility of botulism infection - a rare but serious digestive disorder - afflicting them cannot be ruled out, Ratlam district chief medical officer K.C. Pathak said.
Police have registered a case. Food samples have been taken for tests.