Both incidents are alleged to have happened in 2016 but investigators suspect there may be more victims.
Lack of food could cause additional chickens to die if access isn't restored quickly, one farm said.
"Even though the heavy rains have ended, the flood hazard to life and property is real," city officials said.
Pyotr Verzilov fell ill on Sept. 11 after attending a friend's court hearing in Moscow.
Celia Barquín Arozamena, 22, who had been golfing alone, was found with stab wounds around her head, neck and upper body.