An area below the “Cheesegrater” skyscraper in London was cordoned off Wednesday night after a second steel bolt, the size of a human arm, crashed to the ground. The news comes days after another steel bolt fell from the fifth floor of the Leadenhall Building and landed on a lower level of the 47-storey structure.

An investigation is underway into the two incidents, real estate group British Land, which owns the Richard Rogers-designed building, reportedly said. More than 3,000 bolts are being inspected from inside the building, a spokesperson for the company reportedly said. The second bolt had fallen from the 15th floor of the building.

There were no reports of any injury from the incidents, but a person close to British Land said that the broken bolts could have caused "significant damage" had they hit anyone walking below, The Telegraph reported.

"There is no risk to the structural integrity of the building," British Land said, according to BBC. "Public safety is our priority so we have taken a number of precautionary measures."

British Land reportedly said that the results of the inspection are expected in another 10 days. “Cheesegrater,” which is one of the tallest buildings in London, is expected to open next year.