Police say two children are dead and two adults hospitalized after they were stabbed at a home in California.

A 911 call from within the house in Corona sent officers to the scene shortly before 7 a.m. Saturday. They found four victims.

A 2-month-old girl and her 6-year-old sister were declared dead at a hospital. A man and a woman were hospitalized in serious condition.

Authorities did not release any names and no arrests were immediately made.

A motive for the attack is under investigation.