Umno members who are adamant on criticising the party should be brave enough to quit, said Minister in the Prime Minister's Department Azalina Othman Said.

"If you continuously open your mouth, behaving in a manner that gives strength to the opposition [...] then you should be gentlemen enough (to quit). Be a man and leave.

"It is a free country, those who are unhappy should just go," she told reporters at the sidelines of the Umno general assembly in Kuala Lumpur today.