(KUNA) -- Belgian authorities released Saturday 14 alleged terror suspects who were arrested in a raid early Friday, local media reported. According to Belgian authorities, they were allegedly planning to use force to free Tunisian Nizar Trabelsi, who is currently serving a ten-year-prison sentence for planning an attack on a military base that houses American soldiers in Belgium. Police and security services were placed on a heightened state of alert to thwart any terror attacks in Brussels.