This footage captures the moment two women emptied dozens of items from their ‘specially-adapted’ coats after being stopped by staff at a branch of Quality Save.
The pair reportedly filled a basket with around £200-worth of medication and creams at the Salford shop after being collared while attempting to walk out.
Quality Save bosses claim the women were wearing coats which had been altered so the lining could be filled with goods.
Police were called to the store, at Walkden Retail Park, on Thursday. An investigation has been launched, GMP said. No arrests have been made.
Director of the company Richard Rudkin said the women were detained by staff and ordered to empty their pockets while being filmed.
He said they were held at the shop for around three hours before officers arrived.
Mr Rudkin said:
The footage was shared on Facebook in a bid to deter other would-be 'shoplifters'.
Mr Rudkin said many thieves modify clothing to avoid detection.