This is the heroic moment a big sister saves her little brother from a would-be kidnapper outside their home by grabbing onto him and shouting to raise the alarm.

CCTV security footage from Fujian, in south-eastern China, on 14th April, now being investigated by the police, shows the siblings sitting on a step outside their home when an older boy runs up to them.

With barely a word, he grabs the little boy, who looks no older than five, and tries to carry him away.

But his sister, who appears to be around six, races after them and throws her arms around the older boy, shouting for help.

The would-be kidnapper was thwarted after passersby alerted by her screams intercepted him.

Boy apparently tries to snatch a child but the sister grabs her brother and shouts for help in Fujian, China, April 14, 2025. Note: Photo is a screenshot from a video. (AsiaWire/NX)

The siblings' parents then reviewed the surveillance footage and went to the police, who are investigating the clip.

Reports say the alleged kidnapper was wearing a school uniform from out of town and was unknown to the children.

Child abduction is a huge problem across China, say experts, and in one year alone, Beijing's Ministry of Public Security says 24,000 abducted women and children were rescued.

(Joseph Golder / newsX)