Two 14-year-old boys and a man aged 20 have been arrested in connection with the stabbing of a shopkeeper. The trio were held after the 70-year-old was knifed as he brandished a shop sign in a bid to defend himself during the attempted robbery in Walthamstow, east London. Police are still appealing for information after the attempted raid on the shop, in Carr Road, on Sunday night. Officers were called at around 9.10pm on Sunday by the London Ambulance Service and found the victim with several stab wounds. He is in hospital in a serious but stable condition, Scotland Yardsaid. CCTV footage of the incident shows the shopkeeper being attacked by three assailants as he tries to defend himself while they attempt to rob the store. The two teenagers and the man were arrested on Tuesday and have been taken to an east London police station for questioning. CCTV footage captured the attempted raid on the store CREDIT: METROPOLITAN POLICE A customer is seen using a stool to protect themselves from the hooded and masked attackers. Another customer and the shopkeeper's wife were also in the store at the time. Three suspects were seen to leave the premises immediately after the stabbing. The hooded assailants are pictured on the footage CREDIT: METROPOLITAN POLICE They wore dark tracksuit bottoms and dark jackets with hoods. One man had a grey hooded top underneath a black "Puffa" style jacket. Detective Sergeant Ben Voss, of Waltham Forest CID, said: "This was a violent attack on a pensioner who was trying to run his shop. "The assailants used an extreme level of violence against elderly man who was trying to defend himself, his wife, customers and business." The moment before one of the youths stabs the shopkeeper CREDIT: METROPOLITAN POLICE He added: "The attack could have resulted in tragic consequences but luckily the victim is now recovering in hospital. "I would appeal to anyone who has any information on who was responsible to contact police as soon as possible."