Deoria (UP): A 13-year-old boy has been kidnapped and killed allegedly by his cousin, who is a second year polytechnic student, for ransom, police said here.

Kartikeya Mall, a class fifth student, went missings on March 17 following which his family members received a call on March 20 demanding a ransom of Rs 10 lakh, Superintendent of Police D K Chaudhary said.

The call was made from the mobile phone of Mukesh Singh, Kartikeya's cousin, in Maharajganj district, he said.

Singh was arrested yesterday, Chaudhary said, adding that he has allegedly confessed to strangulating the deceased and disposing his body at a secluded place in Daulatpur Banki range of Maharajganj district.

The accused wanted the ransom money to get his marks increased at the institute, located in Allahabad, he claimed.