Saharanpur SSP Manoj Kumar said the incident took place during a marriage ceremony at the house of a Hardakheri resident.
While women were participating in a marriage ritual amid music, a youth of another community allegedly slapped the DJ, triggering a clash between members of the two communities. This led to a stampede among the women performing the ritual.
During the stampede, a woman died of heart attack due to anxiety, he said.
As soon as the news of the incident spread, senior police officials reached the spot and tried to pacify both the sides.
The SDM has ordered issue of appropriate compensation for the relatives of the deceased.