National Highways North West has confirmed that there was an accident close to Junction 14 (Chester Services) at around 3.30pm on Thursday, July 10.
Two of the three lanes are closed, according to the agency, as debris has proven to be an obstruction in the road.
It added: “Following a multiple vehicle collision, lanes two and three are closed on the M56 eastbound between J15 (M53) and J14 (Helsby).
“Traffic officers are working with emergency services and recovery agents to reopen the lanes.
“There are delays of up to 45 minutes on the approach.”
Traffic is building back towards Ellesmere Port and the Welsh border, according to Goggle Maps.