The Central Bureau of Investigation's probe into irregularities in the planning and execution of the Commonwealth Games last October went into high gear on Tuesday morning when agency sleuths carried out searches in 20 locations in Delhi and the National Capital Region. Raids were carried out at the homes and offices of officials from the Delhi Development Authority and the Central Public Works Department. CBI officers also searched the premises of private firm Jubilee Sports Private Limited in connection with alleged irregularities in laying the synthetic turf for the lawn bowl event. The teams of agency officials,after registering a fresh case under Section 120-B for criminal conspiracy and under relevant provisions of the Prevention of Corruption Act,swooped down at the locations here and in the National Capital Region,official sources said. This is the ninth case in connection with the alleged irregularities in the conduct of Commonwealth Games in New Delhi which were held during October 3-14 last year. Lawn Bowls is a core sport of Commonwealth Games. This sport has been a part of all the 17 Commonwealth Games except the 1966 Games at Jamaica. The event at Commonwealth Games 2010 had six competitions for men and women.