The Home Ministry and the police will not hesitate to use the full force of the law against anyone who undermines Malaysia's economy and democratic process, said Datuk Seri Dr Ahmad Zahid Hamidi.
In a statement on Sunday, the Home Minister described allegations and insinuations against a serving Malaysian Prime Minister as irresponsible and reckless journalism, bordering on criminal offences.
"As investigations are ongoing, all parties (domestically and internationally) should refrain and restrain themselves from making comments on the issue that would cause confusion among the public.
"Various media reports are found quoting unverified documents. Are they authentic? Do they even exist? Who are the unnamed investigators who supposedly traced movements of money?" he asked.
He was commenting on a report in The Wall Street Journal (WSJ) on Friday that stated nearly US$700mil (RM2.6bil) from 1MDB's dealings were believed to have been deposited in Najib's personal bank accounts.
On Saturday, Dr Ahmad Zahid urged the Prime Minister to take legal action against WSJ to clear his name.
"Over the past months, there appears to be attempts to undermine the confidence in Malaysia's economy and the country's democratic elected government.
"This can be a threat to national security," he lamented.
He said the main source for these allegations were from alleged data stolen by an individual who had been detained and was under investigation for attempted blackmail and extortion.
"An independent international cyber security firm, Protection Group International, has confirmed that the theft and information published should be considered unsafe and unreliable," he added.