The incident happened around 11 a.m. at Westend mall in Janakpuri area where the 24-year-old woman jumped and landed on a man, injuring him grievously.
"The woman was identified as Chanchal Sharma of Rohini and the man Sunil Kumar, an employee of a store in the mall.
Both were rushed to a nearby private hospital. The woman was declared dead. Kumar was in critical condition," a senior police official said. The police said they were trying to ascertain the reason behind the woman's suicide.