A woman has been taken to hospital after she was attacked by a man in an alleyway in Cosham.
Officers have cordoned off Colwell Road, Wymering, and a section of the King George V playing fields this afternoon.
Workers at the nearby Lakeside business park in North Harbour were told there was stabbing nearby, although this has not been confirmed by police.
A spokesman for Hampshire Constabulary said: ‘We can confirm police were called shortly after 1pm today to a report of an assault by a man on an adult woman walking in an alleyway between Colwell Road and Northern Road in Cosham.
‘The woman is being treated in hospital for minor injuries, which are not believed to be life-threatening.
‘Extra police patrols are taking place in the area to provide community reassurance.’
Today’s drama comes a little over a week after police confirmed they were hunting for a man they believe may have stabbed two women in the north of the city in the space of 10 days.
But officers today stressed that they were not immediately able to determine whether the latest incident is connected.
The police spokesman said: ‘We’re in the initial stages of an investigation so it is too early to say whether or not this assault is linked to any other crimes.
‘Our continued advice to women and the wider community in Portsmouth is to be alert but not alarmed.
‘Continue your daily lives and business as you would normally, and report any suspicious behaviour you notice.’
The suspect is a white man, about 5ft 8ins tall, with a slim build and short dark hair.
He wore a black or navy-coloured hooded top with white cord.
Witnesses or anyone with information is asked to contact CID at Fratton police station by phoning 101 or 999 in an emergency.
As police hunted for the suspect, people told of their shock at what had happened.
Forensic experts were this afternoon searching for clues in the alleyway.