Thames Valley Police is appealing for information after a woman was bitten by a dog in Milton Keynes.
At around 7pm on Monday, the victim was walking her dog along a footpath down in bushes next to Stratford Road, Wolverton.
A large brown hairy dog with a wide face, belonging to another dog walker, ran towards her and bit her on the back of her left leg, causing two deep puncture wounds.
The victim collapsed to the ground, lost control of her own dog, and the two dogs started fighting in the bushes.
The owner of the offending dog came over to the victim and stood over her as she was lying on the ground before walking off.
There was another man present but he was stood out of the way and did not get involved.
Both offenders are white and of eastern European appearance.
The dog owner is slim, around 6ft 2ins, aged in his late thirties or early forties, and was wearing a khaki raincoat.
The second man is slim and around 5ft 6ins.
Following the incident, while the victim was walking home, she did come across several other members of the public who offered to help her but, due to her dog being in a distressed state, she wanted to keep her distance from them.
PC Jo Gregory, said: “This was a nasty attack in which the victim sustained a serious bite to her leg.
“I am keen to trace anybody who witnessed the attack, or who knows the identity of the males at the scene, to come forward and speak to police on the non-emergency number 101.”