College and high school students have planned to join the general strike.

They had joined the strike by black miners on Wednesday.

Only two dozen members of the union did not join the strike.

They had a meeting with two technicians who then joined the strike as well.

Others joined the strike, raising the numbers to 30 at times.

All but 15 of the city's 300 teachers joined the strike, affecting 4,700 students in the high school and four elementary schools.

Most classes continue even in the universities that have joined the strike.

Over the next few days 340,000 laborers joined the strike.

The city's bus drivers have now joined the strike started by the hospital workers.

It was reported on the following day that teachers had also joined the strike.