The Enforcement Directorate on Wednesday joined CBI in conducting searches in connection with the 2G spectrum scam case and visited the house of alleged hawala operator Mahesh Jain in New Delhi. Official sources said, a team of the Directorate visited his residence in New Friends Colony area. They said, widening the probe , the ED team may also visit some other locations where the CBI was conducting searches. The sources said Jain's name had figured during investigations into the 2G scam and that the Directorate has found that Mahesh and his brother Alok Jain alias Bobby had allegedly registered companies as fronts.