Opec+ is set to agree on a fourth increase in oil output targets in as many months, three Opec+ sources say, even though the US war on Iran is still preventing several of the group’s members from pumping more, according to Reuters.

The war has cut oil flows via the Strait of Hormuz, creating the world’s biggest ever supply crisis as key Opec+ members, including Saudi Arabia, have been unable to supply customers in full since the end of February.

Seven core members of Opec+, which groups Opec and allied producers including Russia, have increased their output quotas from April to June by almost 600,000 barrels per day (bpd).

In reality, the group’s production has collapsed due to export cuts by Gulf members, with April output averaging 33.19 million bpd, down from 42.77 million in February, according to Opec figures.

The seven members will likely increase targets by about 188,000 bpd from July, the sources add. This is the same as the June hike, which was adjusted downward from monthly increases of 206,000 bpd in May and April to account for the UAE’s exit from the organisation.