File photo: AFP

TOKYO, Feb. 28 (Xinhua) -- Tokyo stocks dropped sharply Friday morning, tracking steep losses on Wall Street overnight.

The 225-issue Nikkei Stock Average tumbled 763.46 points, or 3.48 percent, from Thursday to 21,184.77.

The broader Topix index of all First Section issues on the Tokyo Stock Exchange, meanwhile, plunged 50.30 points, or 3.21 percent, at 1,517.76.

All industry categories retreated into negative territory, with mining, real estate and securities house issues comprising those that declined the most by the morning break.