UPDATE: The A30 Eastbound has now re-opened at Summercourt following the earlier incident.
UPDATE: A Holsworthy man,in his thirties, arrested on suspicion of causing death by dangerous driving, has been relased on police bail while investigations continue.
Two cyclists have died following a crash on the A30 involving a lorry this morning.
It is believed the cyclists could have been riding the famous Land's End to John O'Groats route when the incident happened.
Police say the next of kin are currently being identified and that they are not believed to be local.
The lorry involved was an articulated Frys Logistics lorry from Launceston - the driver of which has been arrested and taken into custody on suspicion of causing death by dangerous driving.
The A30 was closed in both directions at Summercourt, around one mile before the Fraddon exit while air ambulance, police, fire and ambulance crews arrived at around 8.30am.
A police spokesman said: “Due to the backpack gear the cyclists were carrying it is thought they were on a long-distance event.
"However, it is not known at this stage whether or not it was a charity event.”
The westbound carriageway of the A30 has now reopened but eastbound carriageway remains closed between Carland Cross and Highgate and is likely to remain so until mid-afternoon.
Motorists are being advised to avoid the area.