India, Oct. 10 -- Tamil Nadu police which have tightened security ahead of the summit between Prime Minister Narendra Modi and Chinese President Xi Jingping in Mamallapuram , said on Wednesday that they have detained two Nigerian men in Chennai for illegally staying without either passport or visa and other supporting documents.

Police investigated the two men, who were looking to rent a house in Chennai's Kelambakkam locality.

"The duo approached a house owner named Arumugam, a retired NCC officer in Kelambakkam on Tuesday night. When Arumugam asked the Nigerian men to show their identity documents of proof, they failed to furnish the same. The house owner then informed us," said a police officer probing the case.

When the police enqu...