Sandringham Road, where the stabbing took place (credit: Google Maps)
A crime scene is in place in Sandringham Road after the attack, which happened at around 4.25pm today.
Two men have been arrested, according to police.
The victim, who is in his mid-twenties, is currently being treated in hospital.
Witnesses say an air ambulance was called to the scene and landed in a nearby field at Barking Abbey School.
The stabbing in Sandringham Road is believed to be linked to an incident in Porters Avenue, Dagenham, during which a 19-year-old man received a knife wound to his hand.
Crime scenes are in place while police carry out an investigation.
Tags: Barking, Upney, Barking and DagenhamTwo people have been arrest following a stabbing in #Barking.
We were called at 16:24hrs to Sandringham Road to a man in his mid-20s suffering injuries. He has been taken to an east London hospital. His condition is critical. A crime scene is in place.— Barking & Dagenham Police (@MPSBarkDag) February 16, 2020