A chemical leak that killed 4,400 fish in a Didcot stream is still being investigated.
The gudgeon, roach, dace and chub were discovered in Moor Ditch, north of the Ladygrove estate, at the end of July.
The Environment Agency (EA) said water samples indicated a cleaning chemical or detergent entered the waterway, but has now been flushed out.
Spokesman Narinder Sokhi said: “The chemical had been identified as a chemical related to cleaning but we do not know the source.”
If an individual or organisation is suspected of being responsible for the pollution, the agency could prosecute them.
Our top stories
8:30am Saturday 28th November 2015
ROAD safety campaigners say they are “astonished” that drivers with as many as 51 points on their licences are still allowed on the county’s roads.
9:00am Saturday 28th November 2015
YOUNGSTERS at an Oxfordshire primary school could finally be able to tuck into their hot dinners in a dining hall after the Prime Minister came to their aid.
8:00am Saturday 28th November 2015
BAYS in Frideswide Square will be “tweaked” after bus companies complained they were too small to safely accommodate vehicles.
6:30am Saturday 28th November 2015
IT HAS called Cowley Road home for the past 90 years, but on Monday family-run Oxford timber merchant W G Powell will close its doors for the last time.
6:00am Saturday 28th November 2015
ALL over Oxfordshire thousands of older people are fighting one of the cruellest but hardest-to-spot maladies of all: loneliness.
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.