WORLD Health Organisation chief Tedros Adhanom Ghebreyesus has accused authorities in Ethiopia of blocking ambulances from reaching scores of victims of an air strike this week, a rare case of speaking out in his official capacity about the conflict in his homeland. Tedros, who is an ethnic Tigrayan and former Ethiopian Cabinet minister, referred in his opening remarks at a WHO briefing to the air strike this week which hit a crowded market in his native region. The federal government has been waging war against fighters loyal to the former regional authorities since last year. "Ambulances were blocked for more…