Police say they have have identified three men who were believed to be in the area at the time.
A new market hall is proposed, featuring artisan food and drink.
Wyre Forest District Council launched a public consultation on proposals for 8 Bridge Street.
Maria Gooding, from Stourport, is among 500 hospitality workers calling for increased support.
Stourport Town Council says it will take on the responsibility of organising the carnival.
The Stourport Carnival Society votes to dissolve amid pleas for more volunteers to help.
They have damaged Hartlebury Common which is a protected nature reserve.
Police say enquiries are ongoing after no one was found inside the property.
Instructor Sarah Wilson says her classes help participants "take some steps to protect themselves".
