The station was shut today (May 2) after reports of a casualty on the tracks at around 12.15pm.
Emergency services flooded the scene, and a person was taken to hospital, where they have been found to have non-life threatening injuries.
Police are not treating the incident as suspicious.
There were severe delays on the entire Jubilee line due to the incident, but at around 2.30pm there was also no service on the line between West Hampstead and Willesden Green due to a separate fire alert.
A spokesperson said: “We were called to Willesden Green LU station at around 12.15pm today (Friday 2 May) following reports of a casualty on the tracks.
“Officers attended along with paramedics and a person was taken to hospital with non life threatening injuries.
“The incident is not being treated as suspicious.”
If you feel affected by what has happened and wish to find support, you can contact the Samaritans on 116 123 via phone for a confidential chat or email jo@samaritans.org.
