A woman was assaulted by a man as she walked home in Huddersfield.
The 26-year-old victim was attacked close to a wooded area off Whitehead Lane, in Primrose Hill.
Police are urging anyone who saw the incident or knows anything about it to contact them.
It happened between 5pm and 5.30pm on Monday.
The woman, who lives in the area, was on her own at the time of the attack.
Police say a motive for the assault is not clear at this time.
Officers have cordoned off a grassed area by the side of the pavement.
A number of officers were at the scene on Monday night.
The condition of the victim is not known, but her injuries are not thought to be life threatening.
The suspect is described as white but quite tanned and aged about 30.
He is slim with long black hair which was described as being flat to his head.
He is approximately 6ft and was wearing grey shorts.
Police are appealing for anyone who witnessed the incident or who can help identify the attacker to call Kirklees police on 101 quoting Police log 1344 of the 25th July.
In unrelated investigations, police would like to speak to the people pictured in the image gallery below. The people pictured in the images may be witnesses as well as suspects. If you recognise anyone, contact police on 101 quoting the reference number on the image caption.