People in the Chinese city of Tianjin whose homes were damaged by the huge explosions at on 12 August have staged protests to demand compensation from the government.
Scores gathered outside the Mayfair Hotel, where officials have been giving news conferences.
Residents say the chemical storage warehouses which blew up had been built illegally close to their homes.
The blasts focused on a warehouse which was storing sodium cyanide.
Tianjin – the toll
- Officials now say 114 people died in the explosions
- Still missing: 70, mostly firefighters
- Nearly 700 are still in hospital
- At least 6,000 people have been displaced, state media report
- Some 17,000 homes damaged by the blasts and their shockwaves
An investigation is under way into what might have triggered the explosions.
The warehouse was storing hundreds of tonnes of sodium cyanide, far more than legally allowed, and was also within 500m (1,640ft) of homes, flouting laws which state a 1km minimum distance.
Local media had earlier reported that there were at least three residential complexes within 1km of the warehouse, which belonged to Ruihai International Logistics.
In the latest in a number of small protests, the people gathered at the Mayfair Hotel on Monday said they wanted compensation for their damaged homes, and would refuse to return to them even if they were ruled safe.
“We don’t know if there will be further leaks in the future. We could be living near a ticking time bomb,” one resident, who gave his name as Chen, told reporters.
In an open letter to the authorities, they said their groundwater could have been contaminated, and that logistics companies and chemical “dumping grounds” remained close to residential complexes.
“Our neighbours lost their lives there. Their screams can never be erased for a long time. How can we live in that ‘execution ground’ with any peace of mind?” the letter states.
What is sodium cyanide?
The chemical sodium cyanide is white crystalline or granular powder which can be rapidly fatal if inhaled or ingested, as it interferes with the body’s ability to use oxygen.
It is mostly used in chemical manufacturing, for fumigation and in the mining industry to extract gold and silver.
It is soluble in water, and absorbs water from air. Its dust is also easy to inhale. When dissolved or burned, it releases the highly poisonous gas hydrogen cyanide.
Public demonstrations remain rare in China, but authorities have allowed some criticism on the highly-publicised Tianjin incident, with even state media taking issue with local authorities’ handling of the matter.
The BBC’s Jo Floto in Beijing says it is clear that many of the rules designed to keep people safe in Tianjin were bent, broken or ignored.
There have also been real questions about the leadership and training of the firefighters who arrived first on the scene on Wednesday, he adds – all but a handful are missing or dead.
Deputy mayor He Shushan has promised: “Once we find any actions that have violated the regulations and laws, we will resolutely punish them and give answers to the victims and people affected.”
The protests come amid continuing uncertainty about the wider environmental impact of the explosion, although state media have sought to tamp down rumours of widespread contamination.
Authorities are still cleaning up the site and putting out the fire at one last active burning point.
The authorities have said only one air quality monitoring station had detected a minimally higher level of hydrogen cyanide.