The province is required to organize an accident investigation to identify the cause before taking out appropriate measures.
The Supreme People's Procuratorate said on Saturday it will supervise the investigation into a deadly fire that killed 29 people in Beijing on April 18.
Dozens more were injured and eight were reported missing after the blast in Panshan county, which is administered by Panjin.
Four people have been taken into custody in relation to a deadly factory fire in Henan province that claimed 38 lives and injured another two, according to local authorities.
There were no major workplace accidents or natural disasters during the weeklong National Day holiday that concluded on Friday, thanks to a series of actions taken by the national emergency management authority.