An Al-Shabaab suicide bomber and gunmen attacked a busy beach in the Somali capital Mogadishu killing 37 people and wounding scores more, officials said on Saturday, in one of the deadliest strikes in the East African country in months.The assault, for which Al-Shabaab claimed responsibility in a post on a pro-Shabaab website, began late on Friday when a suicide bomber detonated a device and gunmen stormed the area.