According to the Guardia Civil, the accident happened at 8.30am when one of the two vehicles involved in the head on collision, veered across to the other side of the road and into the patch of an oncoming vehicle.
The impact between the 4x4 and a Hyundai saloon was tremendous, according to eyewitnesses and both vehicles were a total write-off as a result of the accident.
Passing drivers bombarded the 112 emergency centre with calls and teams of paramedics and the police were on the scene within minutes. Part of the motorway in the direction of Palma was closed as the emergency services dealt with the situation.
Fortunately, none of the injured, three women aged 52'57 and 60 and a 20-year-old male, suffered serious injuries.
One of the women was fitted with a neck brace because she was complaining of back pains but doctors on the scene spotted no serious injuries before all four were rushed to hospitals in the capital where they were said to be recovering well last night.
The Guardia Civil traffic department have opened a full investigation into the accident which could have proved fatal.
The second accident happened at 9.30am in the village of Puigpunyent when a vehicle plummeted five metres down a ravine.
The female driver was trapped in the vehicle while the two male passengers managed to escape with minor injuries.
However, firemen were needed to cut the driver free and she was taken to hospital in a serious condition.
Elsewhere, in Mahon on Minorca, an elderly man was knocked down at 7.50am and critically injured.
Last night he was being treated in the Mateu Orfila Hospital.