US Secretary of State Rex Tillerson will press Russia on its failure to prevent Syria’s use of chemical weapons in meetings this week in Moscow, he said in interviews aired on Sunday. Tillerson stopped short of accusing the Russians of complicity in a suspected sarin nerve gas attack April 4 that killed at least 87 civilians in Syria’s southern Idlib province. “I don’t draw conclusions of complicity at all, but clearly they’ve been incompetent and perhaps they’ve just simply been out-maneuvered by the Syrians,” Tillerson said in an interview with ABC’s This Week programme.