1.   A spokeswoman for the Massachusetts Bay Transit Authority, which runs the subway, said the cause of the crash was unknown.

2.   Officials at CA Metro de Caracas, the state agency that runs the subway, said they were optimistic an agreement could be reached.

3.   The threatened strike at CA Metro de Caracas, the agency that runs the subway, coincides with fresh negotiations to set a new national minimum wage.

4.   The Transit Authority, the branch of the MTA that runs the subways, also said that many of the recommendations have been instituted recently.

5.   The government has threatened to set up a new company to run the subway in an attempt to halt the strike.

6.   The government has threatened to set up a new company to run the subway in an attempt to crack the strike.