Kamana Devi was admitted to zonal hospital at Mandi after she complained of stomach ache last evening. However, she failed to recover, they said.
"Eleven students who complained of stomach ache, headache and fever were admitted to health centre at Ratti and some of them were later shifted to zonal hospital at Mandi and their condition is stated to be stable," police said.
Assistant Superintendent of Police Kulbhushan Verma said investigation is on.
A magisterial inquiry has been ordered into the matter by Deputy Commissioner, Mandi and further action would be taken after the (inquiry) report is received.
As many as 443 cadets, bothboys and girls from different parts of Mandi district are attending the Camp.