the remaining three are being described as wherethe abouts unknown. the third deadly incident since june involving the navy's pacific fleet. >>> now learning the missing argentine submarine with 44 people on board may have suffered an explosion. argentina's navy says the apparent blast was detected hours after it lost contact with the "ara san juan" was week and left relatives of the crew in tears. search efforts will continue until that sub's fate is determined. >>> senator al franken is addressing sexual harassment allegations in a new statement. >> he says he feels terribly that he could make women feel so badly. he's now planning to address the media for the first time on sunday. >> abc's stephanie ramos joins us from washington, d.c. with the latest on all of these scandals. stephanie. >> reporter: kendis and diane, sexual harassment claims have been running wild on capitol hill. you guys know this. we've been talking about it all week. some women who came forward said this bad behavior by members is nothing new. accusations of sexual misconduct