Umno man Saifuddin Abdullah has rubbished Deputy Home Minister Nur Jazlan Mohamed's warning that anarchists will create chaos during the Bersih 4 rally.

In a heated Twitter exchange, Saifuddin flat out said that he doesn't believe this.

Nur Jazlan responded by saying that the troublemakers might even be wearing Bersih colours.

"(You will) have to see whether it comes true on Saturday. Might be yellow shirt too. How to control a big crowd for sure," Nur Jazlan tweeted.

To this Saifuddin ( photo ) replied: "YB. There is such thing as provokater upahan . I bukan bodoh . (There is such a thing as hired provocateurs. I am not stupid)."

Nur Jazlan then questioned whether Saifuddin knew for sure who would be hiring the provocateurs.

"This is scare tactics YB. I don't buy it," Saifuddin replied, in the last Twitter exchange between the two.

Nur Jazlan had earlier warned that "anarchist groups" joining the Bersih rally will attempt to provoke the police into using force against protesters.

He likened this to the Bersih 3 rally in 2012, where police responded with fury towards the end of the rally when some protesters, purportedly on the instructions of political leaders, breached the barricade at Dataran Merdeka.