Lilia Vu, the eventual champion, and England’s Charley Hull were finishing the hole when the incident occurred at 18:15 BST.

Security and police were called in to remove individuals engaged, some of whom were carrying red and yellow flares, and play resumed within minutes at Walton Heath in Surrey.

The protests looked to be directed at AIG, the tournament’s sponsors.

Vu wins the Women’s Open while Hull fades.
Environmental protestors have disrupted many sporting events in England this year.

A smoke flare was set off at the men’s Open at Royal Liverpool last month, and orange powder was thrown onto a green.

During the Ashes Test in June, England wicketkeeper Jonny Bairstow took a Just Stop Oil protester off the Lord’s stadium.

Last month, three Just Stop Oil protestors went onto a Wimbledon court, flinging orange paper and jigsaw puzzle pieces during a match.

In April, there was also a protest during the World Championship of Snooker in Sheffield, during which a guy leaped on a table and threw orange powder.

Following the removal of the Women’s Open protestors, Vu went on to win the last women’s major of the year by six strokes over Hull.