Authorities are asking the public's help in finding two paintings — one of them by famed American Roy Lichtenstein — that were stolen from a Malibu foundation established by the late co-creator of "The Simpsons."

City News Service says the Los Angeles County Sheriff's Department issued the call Wednesday as it tries to find artworks valued at $400,000.

They were reported stolen last Friday from the Sam Simon Foundation.

Simon was 59 when he died in March from cancer.

He left "The Simpsons" after its fourth season under a deal that rewarded him with ongoing royalties from the show. He then channeled much of his personal fortune to philanthropy.

His foundation rescues dogs from animal shelters and trains them to assist the disabled.