The 17th Anniversary of the Karsaz tragedy is being observed by Pakistan people party today.In Karsaz tragedy on this day in 2007, over one hundred and eighty PPP workers were martyred in the attack on the welcoming procession of Mohtarma Benazir Bhutto Shaheed.Chairman Pakistan Peoples Party Bilawal Bhutto Zardari has paid tributes to the martyrs of the Karsaz tragedy.In a statement, he said the tragedy is a solemn reminder of the ultimate price paid by brave party workers, who sacrificed their lives for the noble cause of democracy.Source: Radio Pakistan