WASHINGTON (Reuters) -U.S. retail sales excluding motor vehicles and parts likely posted further gains in September, data from the Chicago Federal Reserve showed on Wednesday, though part of the rise probably reflected higher prices.

The Chicago Fed Advance Retail Trade Summary estimated that retail sales excluding autos and parts increased by a seasonally adjusted 0.5% last month after advancing 0.7% in August. 

CARTS is meant to offer an early read for the official monthly retail sales data, excluding automobiles, produced by the Commerce Department's Census Bureau. The retail sales report, scheduled for release on Thursday, has been delayed by the government shutdown, now in its third week.

When adjusted for inflation, retail sales excluding autos are projected to have risen only 0.2% last month after increasing 0.3% in August.