Glenn Murray struck a stoppage-time penalty as Brighton came from two goals down for the second consecutive game to earn a dramatic point at Southampton.
Murray’s fourth goal in five games came when referee Anthony Taylor ruled James Ward-Prowse had shoved Shane Duffy.
Pierre-Emile Hojbjerg’s 35-yard strike had given Southampton a half-time lead, before Danny Ings’ penalty made it 2-0.
But Duffy’s free header from Anthony Knockaert’s cross two minutes later set up the tense finish.
The two sides began the game level on points in the Premier League table and the opening exchanges reflected that until the home side steadily grew in authority.
It was a Saints corner that produced the first real opportunity after 20 minutes, as both Hojbjerg and Ings saw attempts blocked before defender Wesley Hoedt fired over from close-range.
Chris Hughton’s visitors struggled to create chances in the absence of the injured Pascal Gross, but emerged with greater purpose after the interval as Solly March forced Saints goalkeeper Alex McCarthy into action.
Ings’ penalty momentarily looked to have put Southampton firmly in control with 25 minutes remaining, but Duffy’s lifeline allowed the Seagulls a route back into the match before substitute Alireza Jahanbakhsh hit the post.
And Murray’s leveller – his fifth goal in six starts against Southampton – secured Hughton’s side a first away point of the season.
It also continued the Saints’ miserable home record – they have won just once in the league at St Mary’s since the end of November 2017.