English language students attending a private Dublin college were sent home this morning after teachers at the school refused to teach until they had been paid.
English language teachers belonging to the National College of Business Administration (NCBA) protested last Thursday along with teachers at its sister college Modern Educational Centre (MEC).
They are owed up to six weeks wages.
Speaking to RTÉ News, NCBA owner Tauseef Sarwar said that the college had applied for Accreditation and Co-ordination of English Language Services (ACELS) recognition last November.
ACELS is the Government-supported quality assurance mark for English language teaching.
He said that since applying for this, they had been asking for an inspection date.
Mr Sarwar said that it was increasingly difficult to market language courses abroad without the ACELS mark.
He said that with each passing week, the college was getting into more financial problems.
Last Thursday, Mr Sarwar told RTÉ News that the teachers at the NCBA and MEC colleges would be paid "in the coming days".
This morning teachers decided not to return to the classroom until they had been paid.
Students at NCBA and at MEC have had no classes for the past three weeks.