On a visit to the US to commiserate with the Sikhs after the Gurdwara shooting, Punjab Chief Minister Prakash Singh Badal has been hit with a federal lawsuit by a US-based human rights group alleging the "torture" of Sikhs in the state.

The lawsuit contends that Badal had command and control of law enforcement officials, who "inflicted cruel and inhumane treatment and extrajudicial death" on three named plaintiffs and thousands of other unnamed members of a requested class of plaintiffs, the Journal Sentinel newspaper here said.

Badal is visiting Milwaukee for a wedding and to attend the funerals of victims in Sunday's Gurdwara shooting in which six Sikhs were killed.