Muslim NGO Ikatan Muslimin Malaysia (Isma) has called for the revocation of the citizenship of those who criticise the handling of the MH370 search, especially to foreigners.

Isma vice-president Abdul Rahman Mt Dali said that this included those who are "not in the same boat" with the ruling government and media who are "unfriendly" to the government, such as Malaysiakini .

"The latest news is that there are those among DAP and PKR who malign the government overseas until it causes anger of victims' families towards our government.

"If this is true, then they are traitors whose citizenships should be revoked. I also advise that they move to a country which they prefer," he said in a statement.

He was referring to allegations that DAP and PKR members are criticising the government via Weibo, a Shanghai-based Twitter-like microblogging service, and instant messaging appilication WeChat.

DAP and PKR have denied the allegations, first raised by MCA Wanita chief Heng Seai Kie, and lodged a police report against her.

Meanwhile, Abdul Rahman said that instead of criticising those behind the search, Malaysians should instead rally behind them as patriotism is promoted in Islam.

"As such, Muslims and Malays should not be caught in narrow politics which does not benefit the country or Muslim interests, as even an Islamic government has flaws.

"As such, politicians from different camps should stop acting like children," he said.

He added that this is practised even in other countries, such as Americans who unite over big floods, Australians over massive bushfire and the Japanese over nuclear fallout.

"The people (in those countries) cooperate and one can hardly hear anyone finding fault over the handling of the crisis," he said, urging all to give moral support to the search and rescue team.