A 32-year-old drunk man accidentally shot himself to death while showing his pistol to a friend in South Delhi's Sangam Vihar, the police said on Tuesday.
The deceased has been identified as Amit, a resident of Sangam Vihar, Vijay Kumar, Deputy Commissioner of Police (South), said.
The incident took place on Monday night.
A case has been registered, the police said.
The boy's friend kidnapped him with the help on accomplice and then demanded a ransom of Rs. 3 crore.
Mr Kushner arrived on a chartered flight in the evening, amid tight security.
Bikramjit Singh, arrested in connection with a blast at Nirankari Mission congregation in Amritsar, which claimed three lives, was produced before a court on Thursday.
He also demanded of the SIT that is investigating the cases to summon Congress leaders Rahul Gandhi and Sonia Gandhi and subject them to lie detector tests to establish the alleged Congress conspiracy in the riots against the Sikhs.
Delhi MLA Somnath Bharti was booked on Wednesday on charges of hurling abuses at a woman journalist, a police official said.
The body of the 15-year-old boy who was kidnapped from Rampura, 35 km from here, on Tuesday, was found on Wednesday morning.