By CBS3 Staff

PHILADELPHIA (CBS) — The School District of Philadelphia is warning parents of a possible SEPTA strike next month. The Transport Workers Union Local 234 current contract expires on Oct. 31.

If a new contract is not agreed on by then, the union has authorized a strike as early as Nov. 1.

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In a letter and robocall to parents, the district says that if a strike does occur, the district could shift back to 100% virtual learning.

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A final decision has not been made.

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A SEPTA spokesperson says negotiations continue.