Dozens of emergency vehicles were deployed at the station, and people were being led away in space blankets, an AFP photographer saw.
Local ambulance services mobilised a “large-scale response” to the station including ambulances, air ambulances and tactical commanders.
“We can confirm we have transported multiple patients to hospital,” the East of England Ambulance Service said on X.
Train operator London North Eastern Railway (LNER) said all its railway lines had been closed while emergency services dealt with the incident at Huntingdon station.
LNER, which runs trains along the east of England and Scotland, urged passengers not to travel, warning of “major disruption”.
It serves major stops including in London, Peterborough, Cambridge, York and Edinburgh, and trains are often very busy, and packed with travellers.
