Istanbul (Reuters) - Two employees of Sportingbet have been detained by Turkish police, who are holding several people affiliated with its Turkish online gaming website Superbahis. Shares in Sportingbet, which generated 26 percent of second-quarter gaming revenues and 14 percent of third-quarter gaming revenues in Turkey, were down 5.8 percent at 36.5 pence at 12:04 p.m. British time.