Tripoli: Lebanon's interior minister said a gunman was working alone when he went on a shooting spree that killed four security personnel in the northern city of Tripoli. Raya El Hassan said the shooting by the man identified as a former member of the Islamic State group, Abdul-Rahman Mabsout, is an "individual case" and the situation is under control. She spoke to reporters in Tripoli Tuesday, hours after Mabsout, riding a motorcycle, opened fire on police and army vehicles in the city, killing two police officers and two soldiers before breaking into a residential building and hiding there.