Dutch...

A gunman shot dead three people and wounded nine on a tram in the Dutch city of Utrecht and police said they were hunting for a 37-year-old Turkish man in an apparent terrorist attack.

Dutch authorities raised the terrorism threat to its highest level in Utrecht province, schools were told to shut their doors and paramilitary police increased security at airports and other vital infrastructure and also at mosques.

Prime Minister Mark Rutte convened crisis talks, saying he was deeply concerned about the incident, which came three days after a lone gunman killed 50 people in mass shootings at two mosques in the city of Christchurch, New Zealand.

"The police asks you to watch out for 37-year-old Gokmen Tanis (born in Turkey) in connection with this morning's incident," Dutch police said in a statement.