Shanghai stocks closed down 6.15 percent on Tuesday due to broad worries over the slowing domestic economy and the government's commitment to prop up shares, dealers said.

The benchmark Shanghai Composite Index slumped 6.15 percent, or 245.51 points, to 3,748.16 on turnover of 722.5 billion yuan ($112.9 billion).

The Shenzhen Composite Index, which tracks stocks on China’s second exchange, ended down 6.58 percent, or 153.07 points, to 2,174.42 on turnover of 667.3 billion yuan.