OMAHA, Neb.— A monthly economic index for nine Midwestern and Plains states hit a three-year high in April, suggesting more economic growth over the next three to six months.

A report issued Thursday says the overall Mid-America Business Conditions Index rose to 60.4 from 58.2 in March.

Looking six months ahead, the business confidence portion of the overall index jumped to 64.2 in April from 59.0 in March.