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.
12:09pm Friday 27th November 2015
TWO men have been arrested in connection with the murder of Kerry Reeves, 26, in Abingdon earlier this month.
7:00am Friday 27th November 2015
TRAFFIC jams are now so bad in Oxford concrete is setting in the back of delivery lorries.
9:00am Friday 27th November 2015
FORGET Frozen and park the Playstation... traditional toys are back with a bang this Christmas.
8:30am Friday 27th November 2015
INTERNET users believe some people in Oxfordshire will still struggle to get superfast broadband despite £5.6m of new funding to roll it out to 4,600 homes and businesses.
8:00am Friday 27th November 2015
NEIGHBOURS have branded the £1,500 fine dished out to a boutique hotel owner over clay pigeon shooting “pathetic”.
6:30am Friday 27th November 2015
A CIVIC group has warned plans for up to 190 new homes at Wolvercote’s former paper mill could worsen traffic and air pollution in North Oxford.