Four convicts escaped from a Swiss jail after an inmate lathered himself in soap and squeezed through the food hatch in his cell door.

Skinny Bert Bruegger, 20, stripped naked and rubbed soap all over his body to squeeze through the hole.

Once outside he opened the doors for three of his pals in the neighbouring cells at the prison in Kreuzlingen.

Wardens only noticed the next morning and police have so far managed to catch just one of the escapees.