Britain's Got Talent judge Amanda Holden has tweeted a terrifying clip showing a moped gang targeting a woman and young child in London.
The chilling footage shows two men trying to rob the pair in broad daylight before they were chased away by a passing truck of workmen.
In the CCTV video, four suspects all dressed in black pull up on two mopeds. Two of them approach the woman before one of them makes a grab towards her.
In panic she pulls away and dashes across a busy road to escape. A group of passing builders then stop their truck and chase after the men, armed with metal rods.
Scotland Yard says the woman had been asked by the gang to hand over her jewellery.
"Police were called at 12:35hrs on Thursday, 21 June to Sandpits Road in Petersham after a woman was approached by four men on a black moped and motorbike who demanded her jewellery," a police spokesperson told media.
"They threatened her and a young child who was with her. No injuries were reported. No weapon was seen, although it was intimated."
The clip was shared by Holden, who appealed for information leading to the suspects' arrests.
"I know this is happening everywhere but this was Sandpits Road TW10, June 21,12.35pm broad daylight," she said.
"Mother and child attacked. And some heroes in a lorry chased them off. Call 101 or 999 if u know these scumbags."