The couple, identified as Raju Bhil (30) and his wife Kuri (28) had an altercation between them over some domestic issue following which the woman allegedly committed suicide by jumping into the well in their farm late last night, they said.
Bhil also jumped into the well to rescue her but died eventually during the effort, they said.
In another incident in Dalpura village, a 55-year-old woman Mana Devi died after she allegedly fell into a well this morning, police said.
In a separate incident, a man was killed when his motorcycle was being hit by a speeding mini truck on Udaipur road, they said.
The victim, identified as Haider Ali, was on his way to a poultry farm when the mishap took place.
Further probes are on in all the cases, they added.