The resort island's Urgent Medical Care Service said it received a call at 3:20 am today from a man who said he had killed his wife in the western town of Costa de la Calma.
Local police and ambulance services found a 49-year-old British woman in cardiac arrest with bruising on her neck, but were unable to resuscitate her.
The news agency Europa Press said police began an investigation and arrested a man of British nationality. The detainee will be held in custody before appearing in court tomorrow or Monday.