Fans at Kai Tak for the World Snooker Grand Prix will now be allowed to stay until the last game is finished, the government says, after spectators were ejected from the venue while a match was still underway on Tuesday night.

About 100 people were watching Kyren Wilson play Matthew Selt in Kai Tak Arena when at around 11.15pm, with the match going into the fifth frame, the crowd were told to leave.

Sports Secretary Rosanna Law said on Wednesday that organisers were worried about the availability of public transport if the spectators stayed any longer.

"This situation is obviously not ideal, and we definitely need to take into account the experience seriously and identify remedial measures," she said.

Law described the saga as "teething problems" and said it won't happen again.

"Starting from tonight, all spectators will be allowed to view the entire series of matches until the last game is done. So, there will be no more question of spectators having to leave before the game ends," she said.

Organisers said those affected can get complimentary tickets for another session of the tournament.

"Some spectators were required to leave early before the match concluded and were unable to watch the full game. The tournament organising committee sincerely apologises for this situation," a statement said.