(CNN) — Paul Pelosi, the husband of House Speaker Nancy Pelosi, was attacked with a hammer at the couple’s home in San Francisco by a male assailant early Friday morning, law enforcement sources tell CNN.

Pelosi, 82, is expected to make a full recovery, the Democratic speaker’s office said in a statement.

Drew Hammill, a spokesman for Nancy Pelosi, said the assailant is in custody and a motive is being investigated. The speaker was in Washington at the time of the attack, a spokesperson said.

The Pelosis have been married since 1963 and have five children.