Four residents needed hospital treatment after emergency services were alerted to a chemical smell in a block of flats.
Firefighters, police officers and paramedics were called to Greenhill Court in Lodge Close at 9pm on Tuesday.
Fire crews wore breathing apparatus and specialist detection equipment to try to identify the unknown chemicals involved.
Oxfordshire Fire and Rescue Service sent four engines from stations in Banbury, Deddington and Oxford.
South Central Ambulance Service and Thames Valley Police also attended.
7:30am Wednesday 10th February 2016
SUNKEN boat owner John Simmonds was stunned into silence yesterday when he was handed hundreds of pounds worth of donations from Oxford Mail readers.
6:30am Wednesday 10th February 2016
In a special report, the Oxford Mail exclusively reveals how the owners of Oxford Stadium were still making a profit before closure despite claims it wasn't "viable"
8:00am Wednesday 10th February 2016
FANS could soon be buying Oxford United toothpicks, pet clothing and even lingerie after the club registered its name as a trademark.
6:30am Tuesday 9th February 2016
THE mother and aunt of Prime Minister David Cameron have backed the campaign to save the county’s children’s centres.
5:10pm Tuesday 9th February 2016
HE'S the underdog with the overbite who has been described as the world's ugliest dog.
7:00am Tuesday 9th February 2016
A TEACHER recruitment crisis affecting the ability of schools to improve standards and create stability for pupils is “worse than ever,” it is claimed.