By Alex Lawler, Ahmad Ghaddar and Olesya Astakhova LONDON, July 5 (Reuters) – OPEC+ has agreed a further increase in output targets from August, the group said in a statement on Sunday, adding to global supply at a time when oil prices are falling due to the gradual reopening of the Strait of Hormuz for oil exports. The oil-producing group agreed during an online meeting to increase quotas by 188,000 barrels per day from August, on top of similar increases for June and July.