There has been a crash on the A12 (stock image) Picture: GREGG BROWN
The A11 southbound near Barton Mills was blocked following a two-vehicle crash.
It happened at about 11.52am and involved a Mitsubishi and a Vauxhall, but it is not yet known if anyone has suffered any injuries.
A spokeswoman for Suffolk police said just one of the lanes was blocked so traffic could get through.
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