June 1 (Reuters) - London copper ticked higher on

Monday, supported by concerns over tightening supply and Goldman

Sachs' higher price forecast, though gains were capped by

uncertainties over an Iran peace deal and slower factory

activity in top consumer China.

The benchmark three-month copper on the London Metal

Exchange rose 0.28% to $13,674.50 a metric ton as of 0310 GMT.

The most-active copper contract on the Shanghai

Futures Exchange slipped 0.07% to 104,770 yuan ($15,481.80) a

ton. The Shanghai contract has been traded within a narrow

range, gaining as much as 0.18% before nudging lower.

Concerns over global supply tightness continued to underpin

copper prices, as Goldman Sachs on Monday raised its copper

price forecast for the end of 2026 to $13,735 a ton from

$12,465. Thebank citeda tighter-than-expected market outside the

U.S., with weak mine production growth globally.

Comex copper stocks rose more than 9% to

640,181 short tons (580,762 tons) through Friday, from April 14

when they first started to rise after a more-than-a-month long

plateau, indicating a regional dislocation of copper is set to

re-emerge between the U.S. and the rest of the world.

Goldman sees U.S. copper inventories increasing by around

900,000 tons this year, compared with an earlier estimate of

550,000 tons. Its base case, however, sees no U.S. copper import

tariffs in 2026.

Meanwhile, investors continued to watch developmentsaround

Iran peace negotiations, with positivity connected to President

Donald Trump saying he would soon decide on a ceasefire deal

quickly offset by Israeli Prime Minister Benjamin Netanyahu's

order for a deeper incursion into Lebanon to hit the

Iranian-backed militant group Hezbollah.

China's slowing manufacturing activity also capped copper's

gains. The official manufacturing Purchasing Managers' Index

(PMI) stood at 50, the mark just separating growth from

contraction in May, while a private survey showed a sixth

straight month of expansion, though at a slower pace.

Among other LME metals, aluminium added 0.23%, zinc

ticked 0.10% higher, lead was little changed,

down only 0.02%, nickel dipped 0.25% and tin

gained 0.36%.

Elsewhere on SHFE, aluminium dipped 0.12%, zinc

lost 0.86%, lead was also little changed, up

only 0.03%, nickel dropped 0.71% and tin rose

0.48%.

($1 = 6.7673 Chinese yuan renminbi)