RESCUE teams have continued to work tirelessly to reach trapped firefighters and other victims after a commercial building collapsed in Iran’s capital Tehran. At least 30 firefighters were killed when the 17-storey high-rise Plasco building came down.

The building – which first caught fire – was home to more than 500 garment and clothing workshops offices and warehouses, and was full of chemical materials. The collapse also injured 84 people.

The disaster at the 17-storey building, inadvertently shown live on state television reporting from the site after the building was engulfed in fire on Thursday morning, came after authorities said they repeatedly warned tenants about blocking stairwells with fabric from cramped garment workshops on its upper floors.

The high-rise was home to more than 500 garment and clothing shops, offices and warehouses, and was full of chemical materials, authorities said.

The blaze and the subsequent collapse stunned the city and firefighters and others openly wept on the streets, holding each other for support. Dozens of people lined up to donate blood.

Smoke was still seen rising occasionally from the ruins yesterday.

Workers were digging several tunnels from buildings next door to reach the basement of the collapsed building, and teams of rescue dogs were also at the site.

Authorities described the building, built more than five decades ago, as having a weak structure. Thursday's fire was the worst in Tehran since a 2005 blaze at a historic mosque killed 59 worshipers and injured nearly 200 others.