Abqaiq is at the heart of of Saudi crude processing, and it has been struck previously in the context of the Saudi-Yemen conflict. However, there have been conflicting reports, with some open-source accounts offering satellite imaging saying there are signs of a large fire at the site:

At a moment there are widespread reports that Persian Gulf exports are fast recovering, there are simultaneous emerging albeit delayed reports of new tanker attack incidents that happened Tuesday.

On apparent crude transit recovery amid continued deep uncertainty, "For now, that reduces fears of an immediate crude shortage and explains why prices can fall even though talks between the US and Iran have made no clear progress," Simon-Peter Massabni from XS.com says. "The market's main question is whether this faster pace of shipments can be sustained through October."

But the UK's Maritime Trade Operations agency has announced more vessel incidents which looked to have happened on Tuesday. Three distinct incident advisories detailing strikes on vessels within the region. The affected ships included a liquefied natural gas carrier and a crude oil tanker, both of which were reportedly impacted by unidentified projectiles - with little other details known.

We reported earlier on one of the three assaults, which involved a Very Large Crude Carrier in the Strait of Hormuz getting hit by a drone, after which a fire briefly erupted but was extinguished, and the tanker traversed on, and with no casualties.

In the meantime Islamic Revolutionary Guard Corps (IRGC) spokesman Hossein Mohebbi has proclaimed that there is a "military conflict" in the Strait of Hormuz on a daily basis but that the US is not responding.

"We have been hitting small ships and preventing them from passing for a long time, but America does not respond," Mohebbi told semi-official Fars news agency.

Axios late in the day Tuesday had cited "little progress" in US-Iran indirect talks, with on Wednesday an Al Jazeera correspondent saying that Washington has submitted a counter-proposal to Tehran. Here's more from Axios which basically contradicts much of their own earlier in the week reporting:

Efforts this week by Qatari mediators to broker a diplomatic breakthrough between the U.S. and Iran have made little progress, with neither side willing to budge, according to three sources familiar with the talks. The stalemate bolsters the belief on both sides that a renewed military conflict is becoming more likely. U.S. officials think President Trump could order a return to major combat operations after the midterms.