The Britain-based Syrian Observatory for Human Rights said the seven were killed after being shot in the head, adding that the killings were discovered when volunteers from Syrian Civil Defense arrived to start a shift and found the bodies of their colleagues. [...] it is mostly likely a crime. An opposition activist based in Idlib who has been giving information to The Associated Press about the province for years said the attackers used pistols equipped with silencers, adding that people living nearby did not notice anything unusual.