Jan 24 (Reuters) - U.S. stock indexes dropped at open on Monday, extending last week's bruising selloff, as concerns about soaring tensions between Russia and the West over Ukraine hit risk appetite ahead of a key Federal Reserve policy meeting later this week.

The Dow Jones Industrial Average fell 194.76 points, or 0.57%, at the open to 34,070.61.

The S&P 500 opened lower by 41.62 points, or 0.95%, at 4,356.32, while the Nasdaq Composite dropped 287.43 points, or 2.09%, to 13,481.50 at the opening bell. (Reporting by Bansari Mayur Kamdar in Bengaluru; Editing by Maju Samuel)