Dhaka: New explosions rocked Tianjin on Saturday at the site of a previous chemical warehouse fire and explosions that killed dozens in China this week, state media reported.

Fire has reignited there, sending thick plumes of black smoke into the sky, according to Xinhua news agency.

Authorities evacuated all persons within three kilometres (1.8 miles), Beijing News reported, citing Armed Police. CNN has reported at least one disaster recovery shelter located within the new evacuation radius, reported CNN.

The original spectacular blasts on Wednesday, one of which was the equivalent of more than 20 tons of TNT exploding, left at least 85 dead, more than 700 injured and thousands homeless, officials say.

Flames had appeared to be largely extinguished by Friday, but residents were still worried about lingering contamination after the previous, spectacular explosive fires at the chemical warehouse.

‘I asked my in-laws to take my daughter home, I don’t want them to stay here,’ migrant worker Tian Binyan said. ‘I’m worried. I heard it’s going to rain later and that would make the air toxic.’

She was among the 6,000 or so displaced by the fire and explosions that rocked the port Wednesday night, sending fireballs many stories high and shooting plumes of smoke into the sky.