Updated

The Latest on an explosion at the front gate of a kindergarten in eastern China (all times local):

7:55 a.m.

Authorities are investigating an explosion at the front gate of a kindergarten in eastern China as a criminal act, while the death toll rose to eight.

The official Xinhua News Agency said Friday that police have identified a suspect in the explosion. It was unclear if anyone was arrested, and no further details were provided.

Dozens were injured in Thursday's blast at the Chuangxin Kindergarten in Fengxian as relatives were picking up their children at the end of the school day.

Xinhua says two people died at the scene and six died after being taken to a hospital. Eight people remained in critical condition.

Kindergartens in China have been targeted before in apparent revenge attacks carried out by mentally ill people or those bearing grudges against neighbors and society.

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7 p.m.

Police say an explosion has struck the entrance to a kindergarten in eastern China, with reports saying there have been casualties.

Police officials say they're investigating and have no word yet on injuries or deaths.

However, state media reports say people have been hurt and photos purportedly from the scene and posted to social media showed children and adults lying on the ground, some of them bleeding.

Police say the blast struck at 4:50 p.m. Thursday in Fengxian in Jiangsu province.

Kindergartens in China have been targeted before in apparent revenge attacks carried out by people bearing grudges against their neighbors and society.

China maintains tight control over firearms and most attacks are carried out using knives, axes or homemade explosives.