A man and his 18-year-old son were killed, while his nephew was injured in an attack by a group of people over the bursting of firecrackers during Diwali festivities in Gujarat's Ahmedabad city, police said on Monday.

The incident occurred around 10 pm on Sunday when four persons were quarrelling with some people who were bursting firecrackers in a residential society in the Ramol locality of the city, an official said.