LANSING, Mich. (AP) _ Thieves broke into the mausoleum of auto pioneer R.E. Olds and stole the remains of six family members, police said Monday.

The theft at the Lansing Mt. Hope Cemetery was discovered Friday, but it wasn't known when it occurred, Lansing police Lt. Sam Campbell said in a statement. Evidence indicated the break-in was recent, he said.

Police are looking for a number of missing items, many with the name of the deceased engraved on them. They include two stainless steel boxes, one pinewood infant casket, one bronze box and two grecian urns, Campbell said.

The urns, boxes and casket contained the remains of six relatives. Police wouldn't specify who they were.

R.E. Olds' crypt was not disturbed, the message said. Lansing police are offering a $1,000 reward for information leading to the arrest of the thief or thieves, Campbell said.

''The real question here is that if money was the motive, how come we haven't seen any other crimes like this? So, I don't think money was the motive,'' said Lt. Mike Wahl.

Olds founded the Oldsmobile company in Lansing in 1897. It joined General Motors Corp. shortly after GM was founded in 1908. Olds stepped down as R.E. Oldsmobile president in 1923, and he died in 1950 at age 86.