BOGOTA—Colombia has arrested 10 people accused of involvement in attacks on a helicopter carrying President Ivan Duque and a military base last month that officials said on Thursday were planned by former FARC terrorist leaders based in Venezuela. The car bombing at the base in the northeastern city of Cucuta, home to the army’s 30th Brigade, wounded 44 people, including two U.S. military advisers. Later in June, a helicopter approaching the city with Duque and other officials aboard was strafed by bullets. The 10 people captured in Norte de Santander province are former Revolutionary Armed Forces of Colombia (FARC) terrorists who reject a 2016 peace deal, Attorney General Francisco Barbosa said in a news conference broadcast via social media, and belong to the dissidents’ 33rd front. Three of them took part in the planning and execution of both attacks, and have been detained and charged, while another is a retired …