Thai immigration police have detained the leader of a Cambodian opposition group based in Denmark, Human Rights Watch (HRW) said on Thursday, while a Cambodian official said the government was in discussion with Thailand on the man’s extradition. The detention comes ahead of a July general election that Prime Minister Hun Sen’s Cambodian People’s Party (CPP) looks set to win after the main opposition Cambodia National Rescue Party (CNRP) was dissolved by the Supreme Court last year. Thailand has frequently acquiesced when Cambodia has asked it to repatriate citizens with criminal convictions or those it considers a threat to national security. In February, a woman who threw a shoe at a billboard depicting Cambodian Prime Minister Hun Sen was forcibly sent from Thailand to Cambodia, where she is serving a two-year prison sentence.