One of Tunisia’s most wanted men, a senior commander of ISIS militants in Libya, has been killed fighting with Libyan forces near the city of Sirte, Tunisian security sources said on Tuesday.

The death of Tunisian militant Ahmed Rouissi, who was fighting in Libya’s ISIS ranks, confirms the growing importance of foreign fighters in the Libyan conflict, where two rival governments and armed forces battle for control.

Western governments and Libya’s North African neighbors are increasingly worried about Islamist militants, especially ISIS allies, extending their foothold in the chaotic country just across the Mediterranean from Europe. […]