The collision happened in Hacton Lane just before 3pm (credit: Google Maps)
Emergency services were called to Hacton Lane, near Bevan Way, at around 2.50pm today.
An air ambulance was also sent to the scene and a woman, aged in her 40s, was treated at the scene by paramedics.
A spokesperson for the Met Police said: “She was taken to hospital for further treatment and at this stage her condition is being treated as potentially life-threatening.
“The road is closed in both directions and closures are also in place at Bevan Way and Derby Avenue.”
The closure is causing delays around Hornchurch and Upminster.
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