A suspicious substance had been put through the letterbox in Essex.
The fire service were called to an address in Cowper Avenue, Tilbury shortly before 9am this morning (Thursday 15 March).
The area around the property has been temporarily cordoned off as a precaution.
Tests were carried out by officers, who later identified the substance as a cleaning agent.
They say there is no risk to the property, occupants or wider public.
Police are appealing for help to find a wanted woman from Tilbury, Essex.
Officers want to speak to Hannah Spencer, 23, in connection with an assault and a number of thefts.
Spencer also has links to the Croydon area. She is described as:
- 4ft 9ins tall
A 30-year-old woman has been robbed at knifepoint by three men in Tilbury, Essex.
She was approached by the men while she was walking down an alleyway, between Sydney Road and Auckland Close, before midnight on 18 October.
One of the men demanded she hand over her iPhone. After she refused, he threatened her and pulled out a knife from his jacket.
He also demanded she hand over her Gucci watch and gold necklace.
The men took all three items and ran off towards Canberra Square.
They were all white and believed to be aged in their early 20s.
Two were about 6ft tall and wore black jackets. The third was shorter and wore a grey hooded top.
Police are keen to hear from any witnesses.
Police are appealing for information to find two men suspected of being in a car that deliberately rammed a police car at Tilbury in Essex.
Both vehicles were extensively damaged in the crash at St Chads Road at about 1.30am on Wednesday, December 17.
The marked police car, driven by a female officer on a routine patrol, was hit by a silver Ford Fiesta which then left the scene at speed. It was later found abandoned nearby.
A search was carried out by various police units but there was no trace of the two men, who are suspected of being involved in previous burglaries in the area.
The female officer was taken to hospital for a check-up but did not require treatment.
One lane blocked due to broken down lorry on A1089 St Andrew's Road Northbound between A126 Ferry Road and Thurrock Park Way / Dock Road.
Police in Essex are appealing for witnesses to an armed robbery in Calcutta Road, Tilbury, yesterday evening. Two men entered the Ladbrokes betting shop, one armed with a knife, and threatened an employee. One man jumped over the counter and stole money from the till.
They both then made off on foot in the direction of Ottawa Road. The suspects were both wearing their hoods up and scarfs covering their faces.
Firefighters remained at Tilbury power station over night following following yesterday's blaze.
The operation to remove the wood chips that caught fire is under way. It is expected to take up to two days.
At its height more than a hundred and twenty fire fighters were at the scene.
Electricity supplies were not affected. The cause of the fire isn't yet known.