A display reading " Do not enter" is seen after a 27-year-old Swiss man's attack on a Swiss train at the railway station in the town of Salez, Switzerland August 13, 2016. REUTERS/Arnd Wiegmann

A display reading ” Do not enter” is seen after a 27-year-old Swiss man’s attack on a Swiss train at the railway station in the town of Salez, Switzerland August 13, 2016. REUTERS/Arnd Wiegmann

A display reading " Do not enter" is seen after a 27-year-old Swiss man's attack on a Swiss train at the railway station in the town of Salez, Switzerland August 13, 2016. REUTERS/Arnd Wiegmann

August 14, 2016 8:47 AM (UTC+8)