China's main state broadcaster has released security camera footage showing that a man who was fatally shot by police at a train station behaved aggressively and attacked a policeman with a long baton before the officer opened fire.

The footage Thursday on China Central Television gives a fuller picture of the scuffles leading up to the May 2 shooting of Xu Chunhe in the northeastern town of Qing'an, some of which had circulated online from a bystander's video clip.

The incident drew a public outcry over concerns the policeman had used excessive force.

The edited security footage shows the 45-year-old man punching the officer in the head and later wrestling away the long baton the officer used to try to subdue him and then using it to attack the officer.