Russian Opposition Leader Navalny May Have Been Poisoned, Doctor Says

Russian opposition leader Alexei Navalny was hospitalized after suffering an acute allergic reaction on Sunday, Reuters has reported.

One doctor said he may have been poisoned with an unknown chemical substance.

"We cannot rule out that toxic damage to the skin and mucous membranes by an unknown chemical substance was inflicted with the help of a 'third party'," Doctor Anastasia Vasilyeva wrote on Facebook.

Navalny, 43, was hospitalized on Sunday morning from jail where he is serving a 30-day sentence for violating tough protest laws, a day after police in Moscow detained over 1,000 people for an illegal demonstration which Navalny called for.

Photo: Alexei Navalny/Facebook