The four accused were arrested from Meragoh village in the district.
The incident comes days after the two states signed an agreement to resolve the longstanding border disputes between them.
The strongest showers of the lot will be in store for Northeast India, where the ongoing rain spell is set to intensify over the weekend.
In view of these forecasts, a yellow watch has been issued over the entirety of Northeast India for the rest of this week.
The weather department also predicted that isolated hailstorms are likely over Assam and Meghalaya.
The victim has been identified as Atar Singh Sharma, a resident of Harayana.
During the interaction with villagers, the ministers found that the people were having difficulty getting in traveling as the village falls in the reserved forest area under Assam.
Meanwhile, the police rushed to the scene and injured were taken to a nearby hospital in Silapathar.
Arunachal Pradesh, Assam, and Meghalaya are still on orange alert, advising residents to be prepared for highly hazardous weather.
According to sources, both the arrested poachers were planning to sell the rhino horn to a gang of smugglers.
