Initially, police thought that Akansha had committed suicide as a note recovered from the site stated that the couple was facing some differences with parents beside financial problems.
The note said she was committing suicide and the husband too would commit suicide by jumping from a tower in Sector 25.
When a police team went to sector, 25 they could not trace her husband.
However, her husband Ishan Khosla last night turned up at the police station and allegedly confessed to have killed his wife.
Ishan told police that they got married in June 2011 but did not get along.
Ishan said he smothered Akansha to death with a pillow and planned to commit suicide but could not do so.
"The victim was studying in Noida and her husband worked as a telemarketer. The couple lived in Rohini in Delhi," SP City Yogesh Singh said.
The suicide note recovered from the spot was written by Ishan, police said.