During the operation of railway several minor accidents occurred. Some were a consequence of a human factor while others resulted from a fact that planners from interior of the Austria-Hungary did not know the local microclimate well. Especially around Milje gusts of bora caused several derailments. The most tragic occurred on 31 March 1910 when three people were killed and many wounded. Another derailment near Muggia (Milje) happened in 1916, but no victims are reported. In 1917 Russian prisoners of war deliberately caused a derailment. An engineer and a fireman were killed.