Chennai/New Delhi, July 6 (IANS) Tamil Nadu Police will question three more people Thursday in connection with the killing of a 13-year-old boy inside the army residential campus in Chennai on Sunday.

 
 The police have already questioned 15 people over the shooting of  K. Dilshan.
 
 "No arrest has been made so far. We have questioned around 15 people till date and around three more will be questioned Thursday," R. Sekar, assistant director general of police (ADGP) at Crime Branch-Criminal Investigation Department (CB-CID), told IANS.
 
 He said the questioning is based on suspicion and facts about the people's presence inside the campus that day.
 
 According to Sekar, some people were questioned Wednesday, including Lt.Col. Ajay S. Bharwal.
 
 On Sunday afternoon, Dilshan and his friends trespassed into the army residential quarters to pluck almonds. The boys were shot at and Dilshan was fatally wounded.
 
 Dilshan's autopsy confirmed that his death was caused by bullet injuries and he must have been shot at from a close range.
 
 The police have sent the bullet seized from the spot for ballistic tests to ascertain its make.
 
 Tamil Nadu Chief Minister J.Jayalalithaa squarely blamed the army personnel for the killing.
 
 Speaking to reporters in New Delhi, she said someone from within the army enclave shot at the boy. The state Chief Secretary has written to the army's General Officer Commanding, requesting him to hand over the people responsible for the act.
 
 Indian Army chief General V.K. Singh promised action against those guilty - be it an officer, a soldier or any other individual - in the shooting episode.
 
 Singh, however, maintained that it was not correct to hold the army as an institution responsible for the killing of Dilshan.
 
 "It is not right to say the army is involved. Some individual is being suspected of involvement and an inquiry is going on at the moment. Whoever is involved, be it an officer or a soldier or anybody else, in the killing, action will taken against that individual," he told reporters on the sidelines of a book release function in New Delhi.