The massive Los Angeles Unified School District will be closed Tuesday – and possibly Wednesday and Thursday  because of a planned strike by tens of thousands of teachers and other school employees. 

“All schools across LAUSD will be closed tomorrow,” Superintendent Alberto Carvalho, leader of the nation’s second-largest school district, said at a Monday afternoon news conference. “Tomorrow will be a difficult day.”

Carvalho, who oversees about 600,000 students at more than 1,000 schools, expressed frustration with the union representing workers including bus drivers, custodians, cafeteria workers, campus security and teaching assistants. The union said talks with the school district broke down Monday and “the strike will begin at 4:30 am Tuesday, March 21 and continue through Thursday March 23.” 

But Carvalho said there were no talks.

“I made myself available alongside my team for hours today, hoping that we would, in fact, be able to have a conversation for a whole host of reasons, some of which I do not understand,” he said. “We were never in the same room, or even in the same building.” 

The district’s 35,000 teachers have said they will strike in solidarity with their colleagues, leaving the district little choice but to close schools. The school district is the second largest in the nation.

Carvalho, who also called the district’s teachers and support staff “indispensable,” pledged to be available throughout the night, into the morning and all day Tuesday to restart talks and potentially cut the three-day disruption short.