(Reuters) - Police were seeking suspects on Sunday in what appeared to be the unrelated shootings of two police officers in and near the Missouri city of Ferguson, which remains on edge after a black teenager was shot to death by a white police officer last month. The Saturday night shooting of an officer in the St. Louis suburb of Ferguson did not seem linked to peaceful protests occurring elsewhere in the city, police said, nor was it connected to a separate shooting involving an off-duty police officer in St. Louis early Sunday. ...