There is widespread disruption to all bus and train services in Northern Ireland as public transport workers begin their latest round of strike action.
Workers from the Unite, GMB and SIPTU unions are taking industrial action today, tomorrow and 22 December.
The industrial action is affecting cross-border services with a reduced Enterprise train service operating between Dublin and Dundalk only.
There will be no service to/from Newry, Portadown and Belfast.
Customers who have booked on affected services through the Iarnród Éireann website or app will be automatically refunded.
A number of cross-border Bus Éireann services are also affected.
Bus Éireann Routes 160 and 161 operating from Dundalk to Newry Bus Station will terminate at Buttercrane Shopping Centre. Services to Dundalk will also depart from there.
Expressway Routes 32 and X32 to Omagh Bus Station are picking up and dropping off at the college opposite on Bridge Street.
Expressway Routes 32 and X32 to Strabane Bus Station are picking and dropping off at Lidl, opposite the station.
Expressway Routes 30 and X30 and Bus Éireann Route 458 to Enniskillen Bus Station are picking up and dropping off at the car park beside the station.
Expressway Route 64 and Bus Éireann Route 480 to Derry Bus Station are picking up and dropping at at the bus stops outside the station on Foyle Street.
The action is also causing disruption to school bus services in Northern Ireland.
The UK government has offered a financial package which includes money to settle public sector pay disputes, but it is conditional on the return of the Stormont Assembly.
Translink has apologised for disruption caused by the strikes.
A statement said: "We are disappointed with this decision by our union colleagues which will disrupt bus and rail services that so many of our passengers rely on, particularly at this busy time of the year.
"We are fully committed to enter into pay negotiations once the budget issue has been resolved.
"The budget issue, which impacts on many public sector workers, needs to be resolved at the NI Executive level."
The industrial action follows a previous one-day strike by bus and rail workers earlier this month.
Unite Union General Secretary Sharon Graham said: "The failure of the Secretary of State Chris Heaton-Harris to intervene and provide any pay increase has left Translink workers no alternative but to escalate industrial action.
"All too often Translink workers are on the front line of social disorder or unrest now in the midst of the worst cost-of-living crisis in a generation, they are being told to accept an 11% real-terms pay cut.
"That is completely unacceptable. They continue to have the full support of Unite in their fight."
GMB regional organiser for Translink Peter Macklin said: "At the beginning of the month, Chris Heaton-Harris was denying he had any powers to deliver a pay increase to workers then earlier this week he tabled a completely inadequate financial package which he claimed would be enough for a public sector pay increase.
"While that has been universally rejected - his actions show that he has had the power all along to intervene and address our members' pay claim."
A Northern Ireland Office spokesperson said: "It is for the relevant Northern Ireland department to make final decisions on pay policies.
"The UK Government has no authority to negotiate pay in Northern Ireland."
"The Secretary of State has invited representatives from the five largest parties in Northern Ireland to discuss how the Government will work with them to stabilise the finances of a returning Executive."
"These discussions are centred on how the UK Government can help with and support sustainability in Northern Ireland's public finances for when a Northern Ireland Executive is restored." the spokesperson said.
