The summons against Modi were issued yesterday by the US Federal Court for the Southern District of New York on a civil lawsuit filed by the New York-based American Justice Center (AJC), a non-profit human rights organisation, along with two survivors of the post-Godhra violence.
The court said that Modi has to respond to the summons within 21 days after it is served on him.
"While we cannot comment specifically on this lawsuit, I can tell you that as a general legal principle sitting heads of government enjoy immunity from suits in American courts," a senior Obama administration official told reporters during a conference call when asked about the lawsuit against Modi.
He said sitting heads of government also enjoy personal inviolability while in the US, which means they cannot be personally handed or delivered papers or summons.
More From This Section
In New Delhi, Government termed the case against Modi as a frivolous and malicious attempt to distract attention from his US visit.
"The allegations in the case are baseless. Appropriate steps are being taken to address the matter," the External Affairs Ministry said.
The lawsuit against Modi has been filed under the Alien Tort Claims Act and the Torture Victim Protection Act.
Seeking compensatory and punitive damages, the 28-page complaint charges Modi with committing crimes against humanity, extra-judicial killings, torture and inflicting mental and physical trauma on the victims, mostly from the Muslim community.
"Time and place and the trappings of power will not be an impediment to justice," he said.
The Alien Tort Claims Act, also known as Alien Tort Statute (ATS), is a US federal law first adopted in 1789 that gives the federal courts jurisdiction to hear lawsuits filed by US residents for acts committed in violation of international law outside the US.