Russian authorities announced a manhunt on Saturday after six convicts escaped the correctional facility where they were being held through a secret tunnel. Prison guards in the western Lipetsk region were alerted to the prisoners’ disappearance after carrying out a routine inspection. “In general regime penal colony No. 2, an underground tunnel was discovered during a patrol of the premises,” the regional prison service said. “Immediately a count of convicts got underway, which revealed the absence of six inmates,” it added. Authorities did not reveal the prisoners’ identities, but said in a …