AlQa'dah 14, 1436, Aug 29, 2015, SPA -- Lebanon should investigate allegations that security personnel used excessive force to disperse anti-government protesters in Beirut last week, Reuters cited Amnesty International as saying on Saturday. This came ahead of another planned mass protest march in the capital Protests drew thousands onto the streets before turning violent last weekend, injuring dozens and triggering a threat from Prime Minister Tammam Salam to resign as head of the national unity government.