MOSCOW (Reuters) – Russian police detained several allies of Kremlin critic Alexei Navalny on Tuesday and raided two of his regional offices, a protest monitoring group said, a day before his supporters plan to stage mass protests over his deteriorating health in jail. Navalny, 44, President Vladimir Putin’s staunchest critic, declared a hunger strike three weeks ago to demand access to better medical care. He was moved on Sunday to a prison with a hospital. His supporters say they fear for his life. The state prison service has said his condition is satisfactory and that he has agreed to rece…