France, Dec. 13 -- Poland, a strong supporter of Ukraine in its fight against Moscow, announced plans in May last year to bolster a long stretch of its border that includes Belarus and the Russian exclave of Kaliningrad.

The main task of the German soldiers in Poland will be "engineering activities," a spokesman for the defence ministry in Berlin said late Friday.

This could include "constructing fortifications, digging trenches, laying barbed wire, or erecting tank barriers," he said.

"The support provided by German soldiers as part of (the operation) is limited to these engineering activities."

The spokesman did not specify the exact number of troops involved, saying only it would be a "mid-range two-digit number".

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