Rashtriya Kranti Party chief Kalyan Singh on Wednesday said the warrant issued by the Liberhan Commission, which is inquiring into the Babri Masjid demolition case, against him was illegal and "nobody in the world" could force him to appear before it.

"Under the Commission of Inquiry Act, no commission has the jurisdiction to issue warrants," he said in Lucknow.

The commission had issued only a warrant and not a non-bailable warrant, as reported earlier, he said.

"We will challenge the commission's order in court," he said, adding, "no commission can threaten Kalyan Singh by issuing warrants."

He said he would depose before the commission only if Prime Minister Atal Bihari Vajpayee and Deputy PM Lal Kishenchand Advani were asked to do the same.