Police in Hillard, Ohio, have contacted nearly 1,000 people within a four-block radius of the apartment where the computer tape was stolen June 11 from the intern's car, The Columbus (Ohio) Dispatch reported Saturday.

"We're trying to develop leads," State Patrol spokesman Lt. Tony Bradshaw said.

State workers and security experts at Interhack Corp. in Columbus are reviewing a duplicate backup tape to determine how much personal information was on the stolen tape.

State authorities have said the missing tape contains the Social Security numbers, banking information and other sensitive data for more than 500,000 state workers and taxpayers, the newspaper reported.

There is no evidence the data has been used, said state officials.