Mapperley Top school evacuated after chemicals found
A primary school and a number of homes were evacuated after police found "a small quantity of unknown chemical" in a Nottinghamshire house.
A 320ft (100m) cordon was placed around the property on Central Avenue in Mapperley Top as a precaution.
Bomb disposal experts carried out a controlled explosion on Thursday afternoon.
Several roads were closed but have since reopened and people have been allowed to return to their homes.
Central Avenue remains cordoned off.
Police were carrying out a search at the house near Nottingham when they found the substance.
A 26-year-old man and a 23-year-old woman were arrested during the raid.
Sent to laboratory
Officers entered the flat at 07:30 BST on Thursday and executed a search warrant in relation to the theft of a vehicle, a police spokesman said.
The pupils at Mapperley Plains Primary School were taken to the Mapperley Social Club as a precaution and local residents were taken to Richard Herrod Centre in Carlton.
Supt Mark Holland said: "In course of the search, officers found a chemical substance and withdrew from the premises.
"We had to evacuate 60 residents… and we have had help from specialised military personnel to identify the chemical and they have conducted a controlled explosion."
A sample of the substance has been sent to a laboratory for analysis, he said.
The search of the property is expected to last until Friday.