An international human rights group has asked the Indian government to prosecute those involved in 1984 Sikh riots, following the assassination of Prime Minister Indira Gandhi.

"The victims of the 1984 massacres have waited for the law to take its course and, sadly, they are still waiting. The government should prosecute those involved in the riots," Meenakshi Ganguly, senior researcher on South Asia at Human Rights Watch (HRW), said.