A 22-year-old-man with the surname Xu was responsible for the explosion near a kindergarten in Fengxian County, eastern China's Jiangsu Province that left at least eight people dead, police said on Friday.

The explosion happened at around 16:48 local time (0848 GMT) on Thursday afternoon.

Sixty-five people were injured and taken to hospital. 

Of the eight people in critical condition, four are now out of danger.

The suspect, who was also killed in the explosion, assembled an explosive device and detonated it outside the kindergarten when parents were picking up their children.

Media reports said that the man was going through difficulties and suffered from a neurological disease known as vegetative dystonia, which is characterized by a disorder of functions and senses of the body without any underlying organic cause.

Police investigators found explosive materials in Xu's rented home and the walls were covered with words such as  “death,” “deceased,” and “extinction”.

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8 dead, 66 injured in kindergarten explosion in eastern China

7 dead, 66 injured in kindergarten explosion in eastern China