The NYPD is seeking a suspect in a pair of vicious strong-arm shop robberies that left a 66-year-old man and 88-year-old woman hospitalized in serious but stable condition.The two attacks on storekeepers took place on Sunday afternoon within a mile of each other in lower Manhattan, police said in an appeal to the public for information on the suspect.The suspect is described as a male, 45 to 60 years old, bald, and last seen wearing blue jeans, an orange baseball cap, and an orange T-shirt.The first shocking assault occurred at about 12.45pm, when the suspect approached the the store clerk at Seward Park Liquors on the Lower East Side menacingly wielding a wine bottle.The crook threatened to beat the store employee with the wine bottle unless he handed over cash from the register, according to police.The clerk, a 41-year-old man, bluntly refused. As the suspect took a swing at him with the wine bottle, the employee tried to flee.Surveillance shows the deranged robber chasing the clerk, trapping him in a corner and hurling wine bottles at his head.After the clerk managed to escape outside of the store, the suspect opens the cash register and loots the till. Police say he made off with about $200 in cash.The clerk was treated at the scene by paramedics. But the demented robber's violent spree was just getting started.