Medecins Sans Frontieres
says hospitals it supports in Syria treated about 3,600 patients with
"neurotoxic symptoms", of whom 355 have died.
It said
the patients had arrived in three hospitals in the Damascus governorate
on 21 August - when opposition activists say chemical attacks were
launched against rebels.
But MSF says it cannot "scientifically confirm" the use of chemical weapons.
Both sides in the conflict accuse each other...