"Sub-Inspector of the area Prithvi Raj Singh and constable Pitambar Singh were suspended for laxity. Six persons named in the FIR filed by the son of one of the deceased were arrested last night," Superintendent of Police (SP), Atai Saxena said.
A licensed rifle and a country-made weapon were seized from the arrested persons, he said.
Three persons were shot dead and another injured when some men opened fire on them in Mumthal village over old enmity.