METALS-London copper near highest in three weeks

MELBOURNE, May 26 (Reuters) - London Metal Exchange copper hovered near its highest in three weeks on Friday, supported by supply concerns after news of further disruption at Indonesia's Grasberg, one of world's biggest copper mines. FUNDAMENTALS * LME COPPER: London Metal Exchange copper traded little changed at $5,718 a tonne, easing 0.1 percent by 0143 GMT, to trim a small gain from the previous session. Prices on Thursday tipped the highest since May 3 at $5,768.50 and have