Channelling Liam Neeson, the TV presenter and former newspaper editor issued his threat in a furious tweet on Wednesday (November 29).
A spokesman for the Metropolitan Police confirmed to getwestlondon the window of a car in Talgarth Road was smashed and a black backpack stolen at around 6.30pm on Wednesday.
Police received reports the car targeted by two men on mopeds, but the force is yet to make any arrests in connection with the incident.
As well as "promising" to find the culprits, Piers Morgan also offered a reward to anyone who found the backpack, which he said contained "two years of study work".
Addressing his 6.25million followers, the host of Good Morning Britain said: "To the 2 scumbags on a motorbike who just steamed my middle son’s car at a West London M&S garage, smashed it up & stole his bag containing 2yrs of study work... I will find you. Consider it a promise not a threat."
A follow-up tweet read:
"In the meantime if anyone finds a black Eastpak rucksack discarded near the M&S garage on Talgarth Road, I will reward you handsomely. No value to a thief, enormous value to my son."
Many twitter users drew comparisons between the divisive commentator and Neeson's character from the Taken movie franchise, who famously says:
"If you let my daughter go now, that'll be the end of it. I will not look for you, I will not pursue you.
"But if you don't, I will look for you, I will find you, and I will kill you."
The Metropolitan Police is asking anyone with information about the incident to call Hammersmith and Fulham police on 101.
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