Five people were killed as two groups opened fire on each other in Uttar Pradesh's Rae Bareli district last night. The clash started around 9.30 pm after a group of men from the adjoining Pratapgarh district allegedly attacked the house of the pradhan of Itaura Buzurg village -- about 117 km from state capital Lucknow. Reports from the area suggest a property dispute could be at the bottom of the clash.