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BBC Live reporter
Brighton and Hove City Council says it’s calling in an independent investigator, after a wildcat strike by refuse collectors.
The authority confirmed that unofficial strike action took place at the Cityclean depot, following a number of “allegations and counter allegations about members of staff”.
Some of the staff involved have been asked to work away from the depot, which the council said was to ensure disciplinary and grievance procedures are carried out fairly.
The city’s bin collections were hit by a series of strikes by GMB workers from 2014, in a long-running dispute over pay.
The GMB's Brighton branch said it was told of the walkout by the council on Friday morning, but was not officially involved.
We’re not clear about why the unofficial action took place today but we’re talking with everyone involved and we’re determined to work with the GMB and ACAS to resolve this and agree future ways of working together."
More talks will take place next week to try to resolve industrial action that has been taking place at the Sellafield nuclear site.
Nearly 200 staff, including security guards, caterers and cleaners employed by the contractor Mitie, have been striking in a row over pay.
The GMB trade union has described two days of talks as a "potential real step forward" and says further discussions will take place a week today.