The incident occurred last night when some youths were returning home after a programme when another group of four-five youths had a verbal spat with them.
"Within minutes, over hundred persons from both the sides gathered at a bus stand and some men from the minority community opened fire leaving several people injured," SP Pratapgarh U K Chhanwal told PTI today.
This led to exchange of fire and stone pelting from both the sides. The youths, who opened fire first, sped away towards another nearby village Moheda and opened fire there also in which some locals got injured.
Over 20 thatched houses and shops were set ablaze in Kotdi area following which the district administration has imposed curfew, he said.
"Additional forces were rushed to the spot and policemen from other districts were also mobilised after the incident. Curfew was imposed and situation is under control now," he said.
The SP said that the police were identifying those who were involved in the incident.