Meta Platforms Inc will begin laying off employees tomorrow morning, Chief Executive Mark Zuckerberg told hundreds of executives today, the Wall Street Journal reported.

Mr Zuckerberg appeared downcast in the meeting and said he was accountable for the company's missteps and his over-optimism about growth had led to overstaffing, the report added, citing people familiar with the matter.

He described broad cuts and specifically mentioned the recruiting and business teams as among those facing layoffs, the report said.

It added that an internal announcement of the company's layoff plans is expected around 6am (11am Irish time tomorrow).

The specific employees losing their jobs will be informed over the course of the morning, the report said.

Meta's head of human resources, Lori Goler, said employees who lose their jobs will be provided with at least four months' salary as severance, the WSJ reported, citing people familiar with the matter.

Meta reported more than 87,000 employees at the end of September.

Around 3,000 people are directly employed by Meta in Ireland and an additional 6,000 people support its operations across multiple sites including the company's International Headquarters, Clonee Data Centre in Meath and Reality Lab in Cork.

The company declined to comment on the report.

The development comes after Twitter laid off half its workforce across teams ranging from communications and content curation to product and engineering following Elon Musk's $44bn takeover.

However, on Sunday Bloomberg reported Twitter was reaching out to dozens of employees who lost their jobs, asking them to return.

Microsoft Corp also laid off around 1,000 employees across several divisions in October, according to an Axios report.

Speaking on RTÉ's PrimeTime programme this evening, the Tánaiste Leo Varadkar said his office had been in touch with the large tech companies here in recent days and he was confident that they would honour their legal obligations in relation to redundancy and compensations.

He admitted that he did not know the scale of the job losses across the tech sector and that there was little the Government could do to influence the companies involved in relation to them because these were global decisions that were being applied to Ireland.

Mr Varadkar said that while the tech sector was important, it amounted to just 6% of our employment and 16% of our economy. He said other sectors were important too such as pharmaceuticals, medical devices and financial services.

Mr Varadkar said it was not possible to know how much corporation tax Ireland stood to lose because of the present uncertainty, but the Government was very much aware of the potential vulnerability posed by the amount of money Ireland takes in corporation tax profit.

He said that was precisely why the Government was putting funds into reserve for this year and next year.