The media tells us that Russia attacked the port of Odessa with drones. The port of Odessa is an important place for Ukraine. From there, Ukraine's grains and oils can easily be shipped to Western Europe, using the river Danube. (see link). If this is true, this could effect the grains, when they open.

https://www.cnbc.com/2023/09/03/russian-drone-attack-in-odesa-region-hits-danube-port-infrastructure-ukraine.html

I also checked a russian newxspaper. They said that an oil storage facility of the Ukrainian military was the target

In the meantime, NBC reports that residential buildings and a church were hit.

https://www.nbcnews.com/news/world/russia-ukraine-war-missile-attack-odesa-orthodox-cathedral-rcna95785

In other words.... it should not affect our markets