METALS-China aluminium hits 5-year high on capacity closures

MELBOURNE, Aug 10 (Reuters) - China aluminium extended gains on Thursday to strike its highest since 2012, with investors flooding into the market on prospects that capacity closures in the world's top producer would tighten supply. FUNDAMENTALS * SHFE ALUMINIUM: Shanghai Futures Exchange aluminium had climbed 1.4 percent to 16,275 yuan ($2,443) a tonne by 0240 GMT, having earlier hit its highest since May 2012 at 16,460 yuan. Open interest flew to a record-high around 900