Maharashtra Home Minister Dilip Walse Patil on Sunday police teams from four-five states were working together on the case of murder of popular singer and Congress leader Sidhu Moose Wala in Punjab last month and the Maharashtra Anti-Terrorism Squad (ATS) was also keeping an eye on it.

The Delhi Police recently said gangster Lawrence Bishnoi was the mastermind behind the murder and that they had identified six shooters allegedly involved in the killing of Moose Wala. The singer's death was an organised and brazen killing, the Delhi police had said.