Gunwharf Quays has been evacuated this morning following the discovery of a WWII German bomb.
A spokesperson for the shopping centre has confirmed that the area has been cleared temporarily.
Police are warning members of the public to avoid the area.
Those evacuated from the area will be directed to the John Pound Centre, in Queen Street, one of two rest centres set up. The other is at Portsmouth Cathedral.
The 300m cordon will also require other areas to be evacuated, including the Wight Link terminal, Old Portsmouth, Portsmouth Harbour station, Gosport ferry station and the Hot Walls areas.
Cigarette butts disposed of in a bathroom drawer caused a fire alert at Gunwharf Quays this morning.
Residents on the eighth floor were woken by the sound of a smoke alarm just before 6am and crews from Cosham and Southsea were called to the residential tower at East Side Plaza, better known as the Lipstick Tower.
Smoke was discovered on the floor and firefighters in breathing apparatus traced the fire to a bathroom in one of the flats, where a drawer stuffed with cigarette ends was smouldering.
The firefighters were able to remove the drawer and extinguish the smouldering fire before it spread any further. The resident of the flat had managed to escape having been alerted by the smoke alarm and no-one was injured in the incident.
Fans of bike stunts have been watching the UK's top mountain bike display team Zero Gravity showcase their skills in Portsmouth.
The show at Gunwharf Quays also featured Effraim Catlow, the former World BMX Freestyle Champion. Speaking to ITV Meridian, Hampshire-based Chris Doney, who is one half of Zero Gravity and also the British Freestyle Champion said the sport attracts people of all ages.
Hundreds of people were evacuated from a shopping centre in Hampshire this morning because of a fire.
The blaze at Gunwharf Quays in Portsmouth broke out in the roof space of a Chinese restaurant. The centre has since re-opened.