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iranintl – A network of tunnels formed by illegal underground excavations beneath Tehran’s Grand Bazaar has triggered official warnings over serious safety risks, while raising questions about their purpose and those behind the digging.
The Grand Bazaar, one of Tehran’s most important commercial and historic areas, is facing a crisis that has developed below ground rather than at street level.
Iranian media reported the discovery of excavations beneath the Azadi (Dastmalchi), Ziba and Naderi caravanserais within Tehran’s Grand Bazaar in the capital city’s downtown.
Given that the buildings are physically interconnected, damage to one structure can affect the others.
Size and extent of excavations
No official measurements have been released on the length or size of the underground spaces.
Tehran-based Payam-e Ma reported that unknown excavators had dug a deep and narrow tunnel covering about 5,000 square meters beneath the Grand Bazaar, close to the historic core of central Tehran. The report did not cite a source for the figure.
The estimate was attributed elsewhere to a bazaar shopkeeper identified as Mr. Fili, who was quoted by the semi-official ISNA as saying the operation included around 5,000 underground spaces and nearly 12 exit points, making the work easier to conceal.
When did the work begin?
Mohammad Amini, mayor of Tehran’s District 12, said the illegal construction likely began in the mid-2010s and continued until the end of last year.
If accurate, the timeline raises questions about how such large-scale activity could have gone undetected by municipal and oversight bodies for years.
Some Tehran bazaar traders have disputed that assessment.
One long-time shopkeeper told Iran International that continuous police monitoring makes any nighttime activity in the bazaar without official permits effectively impossible.
Another shopkeeper said that due to oversight by municipal authorities, police and cultural heritage bodies, bringing any construction materials into the bazaar — even a single bag of cement — requires official approval.
Amini said no new violations have been reported since the issue was identified sometime between late March and mid-April this year.
It remains unclear why the municipality did not publicly address the issue earlier, despite being aware of the violations since then.
Purpose of the excavations
Officials say the main aim of the excavations was to create a new underground level, likely intended for storage or commercial use outside formal oversight.
Ali Nasiri, head of Tehran’s Crisis Management Organization, said a new level had been created within part of the building foundation without technical feasibility or structural resistance.
The Research Center of the Ministry of Roads, Housing and Urban Development, the body responsible for assessing building safety, said technical inspections showed the caravanserais had become structurally unstable.
Official reports cite damage including distorted ceilings and weakened or warped columns.
The Fire Department and the Crisis Management Organization said about 1,000 shops operate in the affected area, employing roughly 3,000 people on a permanent basis.
Authorities estimate that 5,000 to 6,000 people pass through the area daily and have warned that any incident could lead to a major human disaster.
Who is responsible?
Despite judicial orders and confirmation that violations occurred, authorities have not disclosed the identities of those responsible for the excavations.
City officials say individuals seeking to profit from the project have been identified and the case is under investigation, but no further details have been made public.
Some shopkeepers and experts continue to question how a project of this scale could have continued for months or years in one of Tehran’s busiest areas.
