Four people sitting at the shop located on the footpath on West Avenue Road in Central Market were injured and were rushed to the hospital. One of them died during treatment, he said.
"The bus on route number 567(Nangloi to Lajpat Nagar) was allegedly being driven at high speed," the officer said, adding the driver, 40-year-old Sandeep Kumar, has been arrested.
The driver claimed that a vehicle moving ahead of the bus took a sudden turn. To avoid hitting it, he applied the brakes and lost control over the vehicle and drove into the flower shop, the officer said.
The victim has been identified as Raja, while Mithun, Rakesh Kumar and Shankar are undergoing treatment and their condition is stated to be out of danger, police said.