The Cruz Roja said it had 14 emergencies and five deaths in the first eight hours of the new year.
The agency said 11 persons were badly hurt, too.
At 28 minutes past midnight Thursday, the agency said two motorcycles collided near Quepos, and two persons were taken to Hospital Monseñor Sanabria.
At 49 minutes into the new year, a vehicle struck and injured fatally a 25-year-old woman in Pérez Zeledón. In Sámara at 1:02 a.m. a man died after being struck by a vehicle.
In Curridabat, rescue agency personnel aided a man who had been shot. That was at 1:34 a.m.
A short time later in Villa Bonita, the agency transported a wounded youth to Hospital de San Rafael de Alajuela. The victim suffered a knife wound.
At 3:02 a.m. in Pueblo Nuevo two motorcycles collided and one person died. Another was injured.
At 3:09 a.m. in Alajuelita an 18 year old suffered a gunshot wound.
In Desamparados de Alajuela the agency took three men to the Hospital de Alajuela. They were suffering from gunshot and knife wounds.
In Pérez Zeledón at 7:04 a.m. Cruz Roja workers went to the scene of a man stabbed with a knife. The victim was dead.
About an hour later, the same situation developed in Cariari de Limón where the body of a man turned up in a vacant lot, the agency said.
The activity early Thursday was not unusual. Five persons were reported to have died in the early hours of 2014, too. Due to the holidays, more information is not available immediately on the cases.
The agency said that in 2014 its workers were called to the scene of 273 deaths from a gunshot or knife wound. There also were 371 persons who died at the scene or en route to a hospital in traffic mishaps in 2014, the agency said. The agency said that 76 persons drowned in 2014. There were no reports of this type of death as of Thursday.