A Czech high court has ruled that Indian national Nikhil Gupta, detained in a prison here on murder-for-hire charges in an alleged assassination attempt on a Khalistani extremist on American soil, can be extradited to the US, according to local media reports. Gupta, 52, was charged by US federal prosecutors in an indictment unsealed in November last year with working with an Indian government employee in an alleged plot to kill Khalistani separatist Gurpatwant Singh Pannun, who holds dual US and Canadian citizenships, on American soil.