Ukrainian forces have used Himars rocket systems to halt Russian repairs to a key supply bridge in occupied Kherson as they continue to press on the southern frontline.

Online footage shows a fiery explosion on Antonovsky bridge after at least 15 people were injured as a result of the broad daylight shelling on Monday, Russian news agency TASS said.

"At around 1pm on August 22, in order to disrupt the work to restore the roadway, Ukrainian troops attacked from the American Himars rocket systems at the site of repair work on the Antonovsky Bridge," a local official was quoted as saying.

The bridge has come under fire at least eight times since July 19. 

It is the only road crossing that connects the city of Kherson with the wider region on the eastern side of the Dnieper river.

Russian forces have installed a ferry crossing across the river after traffic on the bridge was blocked for repairs on July 27, when shelling damage slashed its 100-ton carrying capacity to five.