The operator of Shanghai's subway Line 10 admitted Wednesday that human error played a role in Tuesday's train crash that left 189 people injured.

According to an initial investigation, a sudden loss of power caused the signal system to fail, forcing the trains to be operated manually, Shanghai Shentong Metro Group Company said in a statement.

Personnel failed to follow relevant management rules, which led to the accident, said the statement, without elaborating.

Line 10 resumed full operation at 8 p.m. Wednesday after service on a section that included 12 stops had been suspended for safety checks, said the company.

But, the train speeds are limited to 45 kilometers per hour, it said.

So far, 189 people have been discharged from hospital while another 95 are still receiving medical treatment, according to the city's health bureau.