Punjabi Singer Sidhu Moose Wala, who contested this year's Punjab state polls on a Congress ticket, was shot dead while he was driving his SUV in Punjab's Mansa on Sunday.
Punjab Police chief VK Bhawra has said the killing seemed to be the result of an inter-gang rivalry.
His last rites were held today.
On Monday, Punjab Police detained six people from Uttarakhand capital Dehradun in connection with Moose Wala's murder.
Uttarakhand Special Task Force (STF) and Punjab STF, in a joint operation with Dehradun Police, have detained six people who allegedly provided support to the attackers in the killing of Sidhu Moose Wala.