Greater Manchester Police were alerted to the incident near Dewhirst Road, in Rochdale, at 11.15am today.
The circumstances around the incident are still unclear, the Manchester Evening News reported.
Other emergency services are understood to have been scrambled to the scene.
Cops are now investigating whether or not the boy's death is suspicious.
A police spokesman said: "Shortly before 11.15am today police were called to reports of concern for the welfare of a teenager in a field.
"Emergency services attended but the teenage boy sadly died and three teenagers have been taken to hospital for treatment.
"Enquiries into whether there were any suspicious circumstances around this boy’s death are ongoing."
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