Inverness was among places the pests were found to be active, with one spotted in woodland in the city's Ness Castle area on 28 December.

Donaldson would not have to finish the remainder of his stint on the 60-day injured list and immediately could be active with another club, which would pay him only a prorated share of the $720,000 minimum.

An estimated 1,000 to 3,000 such foreign fighters are believed to be active, with most serving in three battalions of the International Legion, according to analysts and academics monitoring them, who stressed that the numbers were rough approximations.

But Israel claimed he continued to be active with the banned group, stripped him of residency, and placed him last March in administrative detention — a status that allows Israel to hold suspected militants for months at a time without charging them or putting them on trial.

But Israel claimed he continued to be active with the banned group, stripped him of residency, and placed him last March in administrative detention - a status that allows Israel to hold suspected militants for months at a time without charging them or putting them on trial.