A boy under 15 years has been arrested suspected of having stabbed a man in his 25s at Hötorget's subway station in Stockholm.
The injured man was awake and able to speak after the incident and has been taken to hospital.
The police have initiated a preliminary investigation into attempted murder.
Exactly what has led to this we are working on finding out, says Mats Eriksson, the police's press spokesperson to TT.
Witnesses and security guards are also being questioned.
