A 9-year-old boy was viciously bitten by a dog in Peterborough, England, as his mother looked on helplessly.

The boy was walking with his mother Tuesday when she stopped to speak to another woman. The woman was accompanied by her Giant Schnauzer. The dog suddenly pounced on the boy and bit him badly on the arm, local media the Sun reported.

Police and paramedics were called to the scene and the boy was airlifted to Addenbrooke's Hospital. Authorities said the child was seriously injured and had to undergo surgery.

The owner had leashed the dog when it attacked the boy. The identities of the child and the two women were not revealed.

Police have seized the dog. No arrests have been made so far in the case.

"This was a terrifying experience for all those involved but especially the young boy who suffered a horrific arm injury," Detective Sergeant Jason Hunns of Cambridgeshire Police told the Sun. "Since the incident, he has undergone surgery and remains in hospital while he recovers. Our investigation continues to establish the full circumstances and I would urge anyone who witnessed the incident to get in touch with us if they have not done so already."

Police urged the public to inform them if they have any information related to the case.

Earlier this month, two toddler girls were attacked by a dog on a street in broad daylight. The incident took place in England. Police said the attack was caught on a nearby CCTV camera and the footage showed the girls screaming as the dog charged at them.

The girls, aged 2 and 3, were accompanied by an adult when they were attacked by the dog. The 3-year-old had injuries on her arm and leg, while the other girl had leg injuries and scratches on her body.

"The dog has been seized by police and inquiries are ongoing," a West Midlands Police spokesperson said at the time.

Representative image AFPTV / Mick GZOWSKI