This handout picture released by the Italian firefighters Vigili del Fuoco press office on July 12, 2016 shows two smashed carriages thrown across the tracks in the incident, which happened on a single track stretch of line between Ruvo and Corato, in the southern Italian region of Puglia. The chief of the firefighting service in Bari said 10 people had been killed and dozens injured. (Photo by Vigili del Fuoco/AFP Photo)





A view of the scene of a train accident after two commuter trains collided head-on near the town of Andria, in the southern region of Puglia, killing several people, Tuesday, July 12, 2016. (Photo by Luca Turi/ANSA via AP Photo)





A man watches the scene of a train accident after two commuter trains collided head-on near the town of Andria, in the southern region of Puglia, killing several people, Tuesday, July 12, 2016. (Photo by Gaetano Lo Porto/AP Photo)





A firefighter works at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Rescuers stand at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Rescuers stand at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Wreckage is seen at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Policemen work at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Rescuers work at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Rescuers carry a coffin at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Rescuers work at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





A man looks at the wreckage at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Rescuers work at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Rescuers work at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





A firefighter works at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





A firefighter works at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Italian Prime Minister Matteo Renzi walks at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Rescuers work at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





A rescuer works at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





A rescuer works at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





One of the two passenger trains collided in the middle of an olive grove is seen in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)





Rescuers work at the site where two passenger trains collided in the middle of an olive grove in the southern village of Corato, near Bari, Italy, July 12, 2016. (Photo by Alessandro Garofalo/Reuters)