Five more people have been arrested by detectives investigating the events leading up to the crash on the A66 which left two police officers and five others dead.Cleveland Police confirmed the latest arrests included a 16-year-old boy as well as four men aged 18, 21, 23 and 25 - taking the total number detained up to 17.It comes after police said five young men who died after their vehicle hit a police car on a dual carriageway may have had links to 'serious and organised criminal activity'. The five people arrested today were:A 16-year-old boy on suspicion of participating in an organised crime group;An 18-year-old man on suspicion of participating in an organised crime group;A 21-year-old man on suspicion of participating in an organised crime group;A 55-year-old man on suspicion of assisting an offender;A 23-year-old man on suspicion of threats to kill.Following the 12 arrests confirmed yesterday, police said a 19-year-old man from Redcar has now been charged with possession of a firearm with intent to endanger life and appeared at Teesside Magistrates' Court today.A 26-year-old man, also from Redcar, was charged with possession with intent to supply class A and class B drugs and possession of criminal property and has been remanded in custody until he appears at Teesside Crown Court on September 21.The 12 people detained yesterday included four arrested on suspicion of participating in an organised crime group and four on suspicion of possessing a firearm.Four of the suspects are also accused of possessing Class A and B drugs with intent to supply. Theo Rae (left) and Cole Worthy (right), both 17, were among the five young men who diedJakub Matusiak (left), 23, and Makai Saddington (right), 18, also died in the crash on Saturday Michael Cahill, 23, was the only person in the car who had no convictions before the crash Police at the scene of the fatal crash on the A66 in South Bank near Middlesbrough on Saturday