Our video shows police guarding a road and an alleyway after a woman was attacked in Portsmouth.
Police are hunting a man who they say assaulted a woman at King George V playing fields today. There are unconfirmed reports that she was stabbed.
Officers say it is too early to know whether or not the assault is connected to two other stabbing attacks on women in the north of the city.
This afternoon, police forensic experts began examining the alleyway that runs from Colwell Road alongside the playing fields to Northern Road.
Officers established a cordon in Colwell Road.