December 31 , 1970 -- Iran -- Two trains collide at Ardakan due to a signalman 's error ; a government source indicates 15 people killed .
Journalists reported at least 70 , with 130 injured .
December 31 , 1970 -- Iran -- Two trains collide at Ardakan due to a signalman 's error ; a government source indicates 15 people killed , but journalists reported at least 70 , with 130 injured .