The crash at around 7.20am on Wednesday closed the M1 southbound between J14 and J13 for around six hours as emergency services cleared the way.
An air ambulance was used to help as five were injured in the crash.
The road reopened at around 1.30pm.
M1 south of Northampton reopens after five injured in crash
The motorway at junction 13 has reopened after an accident which injured five people this morning.
By Alice Dyer
Wednesday, 22nd May 2019, 5:46 pm
