IRVING, Texas (AP) -- The latest on the Muslim teenager who was questioned by police after teachers at his North Texas high school thought his homemade clock looked like a bomb (all times local): 12:15 p.m. President Barack Obama has invited a 14-year-old Muslim student to the White House after the teen was detained by police for taking a homemade clock to school that teachers thought looked like a bomb. In a tweet posted Wednesday, Obama calls Ahmed Mohamed's clock "cool" and says more kids should be inspired like him to enjoy science, because "it's what makes America great." The Dallas Morning News reports that Ahmed enjoys tinkering with electronics and that he built the clock at home on Sunday night. Police detained him Monday after teachers at his school voiced concern about the device. He was suspended from school for three days. ------ 12:01 p.m. Police say they will not charge a 14-year-old Muslim boy whose teachers were alarmed when he brought a homemade clock to his Texas high school. Teachers alerted the police because they thought the clock resembled a bomb. Irving police Chief Larry Boyd said during a news conference Wednesday that Ahmed Mohamed will not be charged with possessing a hoax bomb because there's no evidence that he meant to cause any harm. Boyd says the clock that Ahmed built looked "suspicious in nature." Ahmed's family says high school administrators in the Dallas suburb of Irving on Monday suspended the teenager for three days after he showed the clock to teachers. School district spokeswoman Lesley Weaver says officials were concerned with student safety and not the boy's Muslim faith.