Four new fires burned within a disaster zone in China's Tianjin port where massive warehouse explosions more than a week ago killed at least 114 people and contaminated the area with toxic chemicals.
The fires were spotted in a car park and at three other locations within a 3km (1.8-mile) evacuated area, the official Xinhua News Agency said.
It did not give more details but the state-run Legal Evening News said firefighters put out the fire in the car park and that clean-up work in the disaster zone soon resumed.
Technicians have detected levels of cyanide as much as 356 times the safe level within the evacuated zone, although no abnormal contamination was found outside the zone, according to state media reports.
Workers in protective suits have started clearing wreckage, including charred car bodies and crumpled shipping containers, from the area of chemical warehouses that exploded on August 12. Xinhua said excavating equipment was being used to clear the site and trucks were carrying out debris.
Officials have ordered nationwide checks on dangerous materials. Driving home the importance of such efforts, President Xi Jinping and other top leaders gathered in Beijing to hear a report on progress in investigating the disaster.
"Lately, in some places there have been major industrial safety accidents, one after the other, revealing yet again that problems in the area of industrial safety remain prominent and grave," said a statement issued after the meeting on Thursday.
Suspicions that official corruption contributed to the disaster were underlined in revelations on Wednesday in a Xinhua article that the two silent owners used their connections with police, fire, port and workplace safety officials to secure approval for their company, Ruihai International Logistics, to operate warehouses for hazardous materials.
The Ruihai owners were able to secure permits to store toxic chemicals, including sodium cyanide, ammonium nitrate and potassium nitrate, even though their facility is located less than the required 1,000 meters from homes and public roads - a clear violation of state safety rules.
An Associated Press review of corporate documents found that the principal owner, Yu Xuewei, was also a board member of a state-owned company that operates hazmat warehouses that have similarly been accused of violating the 1,000-metre rule. The state-owned company's parent, Sinochem, has disavowed any connection with Ruihai.
The explosions that rocked Tianjin were among China's worst industrial accidents in recent years and the deadliest on record for the country's firefighters, who accounted for 102 of the 179 total dead and missing. Authorities say almost 700 people remain in hospital, while 30,000 people in and around the area have had their lives turned upside down by the disaster.
Premier Li Keqiang said the investigation into the disaster must be thorough and cover every step taken by the company to obtain the licence to store hazardous materials.