WORLD BRIEFING / GREECE

Gunmen killed an anti-terrorism policeman guarding a witness in central Athens in a brazen escalation of domestic militant attacks prompted by massive riots in December.

The death of 41-year-old Nektarios Savvas was the first killing attributed to terrorism in Greece in several years.

The officer had been guarding the home of a key witness in the trial of the now-defunct far-left Greek terrorist group Revolutionary People’s Struggle, known by its Greek acronym ELA.