NEW DELHI, India (CNN) -- At least three cranes collapsed at a New Delhi metro rail construction site Monday, a day after a subway bridge collapsed at the same location and killed at least five people.
Monday's accident happened during clearing operations, injuring at least four people, according to CNN sister network CNN-IBN.
However, the Delhi Metro Rail Corp. said no one was injured Monday, according to spokesman Anuj Dayal.
Fifteen people were injured in Sunday's collapse of a partly built bridge, officials said.
Sunday's bridge collapse occurred when a metal support gave way, Dayal initially said. There was no immediate explanation of Monday's crane collapse.
In India's capital, notorious for its poor traffic management, construction on metro lines has been frenzied as the city prepares to host the Commonwealth Games in 2010.
New Delhi launched its metro system six years ago, a project that cut through India's bureaucratic red tape, which usually holds back big infrastructure programs. But the metro has a spotty safety record.
Part of a another bridge being built to extend the rail system collapsed in October, pinning a bus and killing its driver.
CNN's Bharati Naik and Harmeet Singh Shah contributed to this report.