BEIRUT, Oct 30 (Reuters) - Lebanese troops detained 50 people in raids on towns and Syrian refugee camps in the **rth of the country, the army said on Thursday, part of a *****down after battles with Islamist gunmen over the weekend. The army has mounted several raids since Islamist militants clashed with soldiers in and around the **rthern city of Tripoli from Friday to Sunday, some of the worst fighting to spill over to Leba**n from the Syrian civil war. Soldiers moved on the towns of al-Minya, Mashta Hassan, Mashta Hammoud and refugee camps in the town of Behneen on Wednesday. ...