A 14-year-old boy has died after being hit by a train at a crossing near Doddington Road, Lincoln.
British Transport Police were alerted to the incident on a foot crossing behind Moorland Way, off Tritton Road, at 8:51am this morning.
Medics pronounced the boy dead at the scene.
The level crossing was closed as police and emergency services attended the incident, but was reopened at 9:50am.
The train involved was the 7:42am Sleaford to Leicester service.
British Transport Police are not treating the incident as suspicious.
This is the fourth fatal rail incident involving people from Lincolnshire in the last four days.
A 26-year-old rail worker, named locally as Scott Dobson died after being struck by the Scunthorpe to Lincoln train at 1.55pm on Tuesday.
Mr Dobson, a contractor for Network Rail, was working on the track near Sykes Lane, about half a mile from Saxilby station.
Four-year-old Emma Lifsey from Haxey died after the car she was travelling in was hit by a train at a level crossing near Gainsborough, also on Tuesday.
The car was hit by a Lincoln to Doncaster train at Beech Hill crossing on Springs Road at Misson Springs, Nottinghamshire, at around 12.30pm.
Also, the body of 51-year-old Robert Roy Poole, from Bingham, was found near the railway bridge in Belton Lane, Grantham, on Monday.
He had been hit by a train but police say there are no suspicious circumstances surrounding his death.