Chicago, Dec 13 (IANS): A US based Sikh rights group has challenged the order of a US court dismissing a human rights violation case against Punjab Chief Minister Parkash Singh Badal for failing to serve federal court summons on him.

In a petition filed Tuesday before the 7th Circuit Court of Appeals here, Sikhs for Justice (SFJ) claimed there was irrefutable evidence that it was Badal who was served the summons on Aug 9 at Oak Creek High School in Wisconsin.

SFJ alleged that Badal had tampered with the witnesses and evidence and obstructed justice. The plaintiffs' families in Punjab were also threatened with dire consequence by police, according to the group's attorney Gurpatwant Singh Pannun.

It also asserted that Chicago-based Sikh Surinder Pal Singh Kalra's claim that he was served with the summons instead of Badal was not credible.

An affidavit by Shiromani Akali Dal (Amritsar) President Simranjit Singh Mann was also submitted alleging that families of plaintiffs Jeet Singh Aloarkh and Jagtar Singh were threatened by Punjab Police coercing them to withdraw the case against Badal.

While dismissing the case against Badal last month, the court of appeals had given SFJ the right to re-file the lawsuit against Badal.

SFJ and SAD have alleged that there have been several hundred cases of extrajudicial killings, police tortures and human rights violations against the Sikh community in Punjab during 12 years of the Badal rule-from 1997 to 2002 and from 2007 to present.