Shanghai aluminium futures hit their strongest in almost three months on Tuesday amid supply worries after Rio Tinto declared force majeure on some customer contracts after the United States imposed sanctions on the firm's Russian partner Rusal. Benchmark aluminium traded on the London Metal Exchange peaked at $2,403 on Monday, its strongest level since September 2011.
The most-traded June aluminium contract on the Shanghai Futures Exchange rose as far as 14,985 yuan ($2,386) a tonne, its highest since January 29. It was up 1.6 percent at 14,805 yuan by 0309 GMT. Shanghai copper rose 1.1 percent to 50,950 yuan.