carrying out

He moved to Frankland after carrying out an earlier attack on prison officers in London's Belmarsh prison in 2020, for which three years and 10 months was added to his sentence.

It added: "We call on the international community to pressure the occupation authorities to immediately release our colleague, medic Assad, who was forcibly abducted while carrying out his humanitarian duties."

The alleged double murder "appeared to be an effort to obtain the financial means and autonomy necessary to carrying out his plan", investigators wrote.

Staffordshire Police, which is carrying out inquiries with West Midlands officers, appealed for anyone with information or recorded footage from the area at the time to get in touch.

Despite this rise, the report also found that the total number of countries carrying out the death penalty stood at 15 - the lowest number on record for the second consecutive year.