Walls, drones and mines - Turkey tightens border as Syria incursion deepens

A Turkish soldier participates in an exercise on the border line between Turkey and Syria near the southeastern city of Kilis, Turkey, March 2, 2017. REUTERS/Murad Sezer

HOYUK MILITARY OUTPOST, Turkey (Reuters) - Turkey is steadily sealing its frontier with Syria, long infiltrated in both directions by fighters and smugglers, with fences, minefields, ditches and a wall that will snake even through the most mountainous regions.

"The Border is Honour", read signs across the walls of Turkish military outposts at Gulbaba and Hoyuk, visited by Reuters on a rare trip organised by the country's armed forces.