The US markets witnessed a lacklustre session ahead of the crucial Fed meet tonight. The Dow Jones industrial average shed 39 points to 13,403. The Nasdaq dropped 21 points to 2582.Indian ADRs ended on a mixed note. MTNL and VSNL surged nearly 2% each to $7.23 and $19.97, respectively. On the other hand, Patni Computers dropped 4.5% to $21.20. Genpact, HDFC Bank and Dr.Reddy's declined over 1% each.