Kuala Lumpur, Aug 2 - The Malaysian government Sunday said it would amend, but not repeal, the Internal Security Act (ISA) -- the preventive detention law the opposition considers draconian.

The government said it would amend the Act but provisions pertaining to national security would be retained after thousands of protesters defied police restrictions and staged demonstrations at several places in the national capital Saturday, demanding that the law be repealed.

Police used water cannons to disperse protesters and detained 238 demonstrators.

Prior to the protests, Prime Minister Najib Tun Razak had Friday said that there was no point in holding rallies when the process to amend the law was under discussion.

The amendment might be effected in the next sitting of Dewan Rakyat, the country's parliament, Home Minister Hishammuddin Hussein was quoted as saying by the New Straits Times Online.

But this would depend on when a study carried out by legal officers and discussions with interested groups was completed.

'If they do not agree with the proposed amendment, we will give them more time before tabling the bill,' he said.