London Underground staff have voted to stage five days of strike action over the decision to close Tube ticket offices.
The RMT union announced that it will walk out from 9pm on Monday 28 April for two days and again from 9pm on Monday 5 May for three days.
It comes after London mayor Boris Johnson said that all 260 offices in stations will be closed with the loss of 960 jobs.
The first two days of action will take place ahead of a May Day event in London in memory of former RMT leader Bob Crow, and politician and campaigner Tony Benn, who died within days of each other last month.
The union claimed that long-running talks hosted by the conciliation service Acas, aimed at settling the dispute over the closure of ticket offices and subsequent job losses were "wrecked by a combination of management intransigence and the introduction of additional measures" the union said worsened the original plans.
A statement said: "It has also been made crystal clear to the union that this is just a first tranche of cuts with even harder attacks being lined up for the near future."
In pictures: Tube strike in London (February 2014)
In pictures: Tube strike in London (February 2014)
1/19 London Bridge station
Mayor of London Boris Johnson leaves London Bridge station
2/19 London Bridge station
Mayor of London Boris Johnson shakes hands with a 'Tube Ambassador' at London Bridge station
3/19 Trafalgar Square
A congested Trafalgar Square during rush hour
4/19 Victoria station
Passengers wait on the east bound platform of the District Line at Victoria station
5/19 Farringdon station
Commuters boarding a train at Farringdon Underground station
6/19 King's Cross station
Commuters waiting at a bus stop at King's Cross station during the London Underground workers strike
7/19 Tube strike
A out of service tube train at an underground station in London
8/19 Tube Strike
A tube strike notice as commuters face a 48 hour tube strike
9/19 Euston station
Commuters attempt to board the overcrowded train
10/19 Liverpool Street station
Crowds gather at the platform
11/19 Victoria station
Victoria line runs only between Seven Sisters and Victoria station
12/19 Victoria station
Commuters board a tube train
13/19 Victoria station
Commuters wait for a tube train
14/19 Waterloo station
Passengers were hit by delays and disruption as they tried to get to work or travel in London after a strike went ahead over Tube ticket office closures
15/19 Waterloo station
Commuters queue at the entrance to the London Underground
16/19 Seven Sisters station
Gates still closed at Seven Sisters at 7.20am despite service due to start at 7am (tube was open and running by 7.30am)
17/19 Earls Court station
Overcrowded platform on the District line
18/19 Stratford station
Extreme chaos as crowds try to board the train on the Jubilee line
19/19 Tooting Broadway
A queue to the station on the Northern line
RMT acting general secretary Mick Cash said: "The talks aimed at resolving the dispute on London Underground over the savage cuts to jobs, services and safety have been cynically wrecked by a Tube management who not only refused to budge an inch but who have chosen to up the ante by injecting further poisonous measures into a package that was already toxic to the core.
"Staff are furious that while senior management pay and staffing levels are being allowed to roar ahead the jobs and pay of the core, station based staff who are the interface with the travelling public are being torn to ribbons.
"The assurances that were given at the time RMT suspended the original action for a proper evaluation of the cuts plans have been ripped up and thrown back in our faces.
"An opportunity to resolve this dispute through eight weeks of talks hosted by Acas has not only been missed, it has been sabotaged.
"As a result, RMT has no option but to put on further strike action in the expectation that the management will now halt these dangerous cuts plans and engage in meaningful and serious talks on the future of a tube network running at full tilt, with further demands in the pipeline, which needs more staff and not less to operate safely."
Workers went on strike earlier this month but action was put on hold while talks were ongoing.
The RMT's announcement came on the same day that the TSSA union's members voted to strike in a separate row over cuts to pensions and a wage freeze. It said three-quarters of its staff had backed the action, with a reported turnout of 47 per cent.
Phil Hufton, London Underground's chief operating officer, said: "Over the past eight weeks, we have met with our trade union colleagues on over 40 occasions, listening to their concerns and making significant changes as a result. I've committed to looking at ways to ensure that no one will lose pay and no supervisor will have to apply for their own job.
"There will be no compulsory redundancies and all requests for voluntary redundancy will be honoured.
"However, the RMT leadership has rejected these changes and has not put forward any credible alternative proposals.
"Next week, we will sit down again with the Aslef, TSSA and Unite unions for further discussions on our plans and how we can meet the needs of our customers in 21st century London.
"I urge the RMT to join us, rather than threaten further unnecessary disruption to Londoners. All a strike will achieve is lose those who take part pay for each day of action."