A 15-year-old girl has died and a 14-year-old boy has been seriously injured in a car crash.
A lorry collided with the two teenagers as they travelled on a bicycle yesterday.
The girl has since died while the boy has received treatment in hospital for injuries.
These are not believed to be life-threatening.
Emergency services dashed to the crash in North Hykeham, Lincolnshire, which is said to have shocked the community.
Inspector Ian Richardson, of Lincolnshire Police, said: "This devastating incident has not only had a major impact on the families of these teenagers but it has shocked the community.
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"It has been difficult for everyone involved and our thoughts are with the families.
"We would ask people not to speculate while investigations continue. If anyone witnessed this incident they can contact us on 101."
Roads in the area were cosed for several hours last night.
Police resumed the investigation today and have made no arrests.
A spokesman for East Midlands Ambulance Service said yesterday: "We received a call at 5.10pm yesterday, October 9 to Station Road, North Hykeham, Lincoln to assist with a medical emergency.
"We sent a LIVES First Responder, two paramedics in ambulance cars, a crewed ambulance and the air ambulance.
"We transported one patient to Queen’s Medical Centre."
North Hykeham, south-west of Lincoln, is a historical settlement with links as far back as 400AD.
More than 13,000 live in the town, surrounded largely by countryside and meadows.
Police are asking any witnesses to call 101 quoting reference 318 of October 9.
