The line is closed between Brixton and Victoria.
TfL has said that there is good service on the remainder of the line.
London underground tickets can be accepted on buses, Southwestern and Southeastern train services as an alternative.
If you need someone to talk to, Samaritans are available to contact any time day or night on 116 123.
A statement on the TfL website says: “Victoria line: No service between Brixton and Victoria while emergency services deal with a casualty on the trac.
“Good service on the rest of the line.
“London Underground tickets accepted on buses, Southwestern and Southeastern train services.”
