TOKYO, May 16 (Xinhua) -- Tokyo stocks lost ground Wednesday morning following Wall Street's overnight sell-off after the long-term U.S. government bond yield spiked to its highest level since 2011.

The 225-issue Nikkei Stock Average dropped 86.93 points, or 0.38 percent, from Tuesday to 22,731.09.

The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, fell 3.17 points, or 0.18 percent, at 1,801.98.

Warehousing and harbor transportation service, bank and mining-oriented stocks comprised those that declined the most by the morning break.