US Federal agents searched the home of Senator Ted Stevens, focusing on records related to his relationship with an Alaska oil field services contractor jailed in a public corruption investigation, a law enforcement official said.

Stevens, 83, has been under a federal investigation for a 2000 renovation project more than doubling the size of his home that was overseen by Bill Allen, a contractor who has pleaded guilty to bribing Alaska state legislators.

Allen is founder of VECO Corp, an oil field services and engineering company that has reaped tens of millions of dollars in federal contracts.