During a routine Border Force check at Harwich International Port around 22:00 BST on Thursday, 35 Afghans, 22 Chinese, 10 Vietnamese and 1 Russian were found, while the 4 Polish lorry drivers were arrested on suspicions facilitating illegal immigration.
The Home Office confirmed, they are presently being interrogated.
A Home Office representative said the stowaways were discovered inside 4 separate lorries instead of one container as erroneously initially reported.
Pregnant women were among 7 stowaways brought to Colchester Hospital as they reported chest and abdominal pains. Thankfully, their conditions are non life-threatening.
A representative from Stena Line, the Stena Hollandica ferry operator which transported the lorries said the service, on Thursday, left Hook of Holland at 14:15 BST.
Though it remains unclear where the lorries whereabouts had been before sailing to Harwich, arriving at 19:45 BST at the Essex port.
The stowaways were found “during a proactive search” of the four lorries by Border Force officers, said a Home Office spokesman.
All 68 immigrants, as confirmed by Stena Line, were in the custody of the Border Force at Harwich Port. It is assumed that those who do not seek asylum will be repatriated.