Leicestershire Police are at the scene of the incident.
A spokesperson said at 1 pm:
‘We are at a collision between Greetham and Tickencote on the A1 so expect delays for a short time.
‘This is also a reminder to not sit in your vehicle when broken down.’
AA Roadwatch reports 11:30 am :
‘One lane closed and queueing traffic due to accident on A1 Great North Road Southbound between B668 (Stretton / Greetham Turn Off) and the Empingham turn off.
‘Travel time is 20 minutes. One lane is closed, affecting traffic heading away from Colsterworth.’